研究業績

2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008

2024

Publication

  1. “Electrons flip a switch on optical communications”,
    S. Hiura:
    Nature 627, 737-738 (2024). [doi]

International conference

  1. “Effective suppression of spin relaxation at room temperature in dilute nitride InGaAsN quantum dots”,
    A. Morita, S. Hiura, J. Takayama, A. Murayama:
    Compound Semiconductor Week 2024 (CSW2024), Lund University, Lund, SWEDEN.
  2. “Room temperature operation of opto-spintronic devices based on III-V semiconductor nanostructures”,
    S. Hiura,
    The 7th QST International Symposium (Invited talk), July 25, 2024, G MESSE GUNMA, Takasaki, JAPAN.

2023

Publication

  1. “Wafer-scale integration of GaAs/AlGaAs core–shell nanowires on silicon by the single process of self-catalyzed molecular beam epitaxy”,
    K. Minehisa, R. Murakami, H. Hashimoto, K. Nakama, K. Sakaguchi, R. Tsutsumi, T. Tanigawa, M. Yukimune, K. Nagashima, T. Yanagida, S. Sato, S. Hiura, A. Murayama, F. Ishikawa:
    Nanoscale Advances 5, 1651-1663 (2023). [doi][PRESS RELEASE]
  2. “Efficient Room-Temperature Operation of a Quantum Dot Spin-Polarized Light-Emitting Diode under High-Bias Conditions”,
    K. Etou, S. Hiura, S. Park, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama:
    Physical Review Applied 19, 024055:1-9 (2023). [doi] [PRESS RELEASE]
  3. “Electric-field driven source of photocarriers for tunable electron spin polarization in InGaAs quantum dots”,
    H. Kise, S. Hiura, S. Park, J. Takayama, K. Sueoka, A. Murayama:
    Applied Physics Letters 122, 232405:1-7 (2023). [doi]
    (selected as an Editor’s Pick)
  4. “GaAs/GaInNAs core-multishell nanowires with a triple quantum-well structure emitting in the telecommunication range”,
    K. Nakama, M. Yukimune, N. Kawasaki, A. Higo, S. Hiura, A. Murayama, M. Jansson, W. M. Chen, I. A. Buyanova, F. Ishikawa:
    Applied Physics Letters 123, 081104:1-6 (2023). [doi] [PRESS RELEASE]
  5. “Vapor‐Induced Assembly of a Platinum(II) Complex Loaded on Layered Double Hydroxide Nanoparticles”,
    T. Morimoto, M. Yoshida, A. Sato-Tomita, S. Nozawa, J. Takayama, S. Hiura, A. Murayama, A. Kobayashi, M. Kato:
    Chemistry – A European Journal 29, e202301993:1-8 (2023). [doi]
  6. “Room-temperature electric field control of spin filtering efficiency for enhanced modulation of optical spin polarization in a defect-functional 0D-2D hybrid nanostructure”,
    S. Park, S. Hiura, H. Kise, J. Takayama, K. Sueoka, A. Murayama:
    Nanoscale 15, 16784-16794 (2023). [doi]
  7. “Effect of dilute nitride GaNAs quantum well thickness on spin amplification dynamics of tunnel coupled InAs quantum dots”,
    S. Sato, S. Hiura, J. Takayama, A. Murayama:
    Applied Physics Letters 123, 232405:1-7 (2023). [doi]
  8. “High-temperature efficient luminescence of dilute-nitride InGaAsN quantum dots with deep electron potential”,
    A. Morita, S. Hiura, J. Takayama, A. Murayama:
    Journal of Applied Physics 134, 224303:1-9 (2023). [doi]

International conference

  1. “Electric-field effects on optical spin polarization in III-V semiconductor quantum-dot-superlattice hybrid nanostructure”,
    H. Kise, S. Park, S. Hiura, J. Takayama, K. Sueoka, A. Murayama:
    The 9th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2023), F-4, June 6, 2023, Ishikawa Industrial Promotion Center, Kanazawa, JAPAN.
    (selected as a Student Award)
  2. “Circularly polarized light detection characteristics of spin photodiode based on a dilute nitride GaNAs spin filter”,
    T. Hioki, K. Etou, S. Hiura, J.Takayama, A. Subagyo, K. Sueoka, A. Murayama,
    36th International Microprocesses and Nanotechnology Conference (MNC 2023), 17P-1-13, November 17, 2023, Keio Plaza Hotel Sapporo, Sapporo, JAPAN.
  3. “Room-temperature electron spin transport to InAs quantum dots using a dilute nitride GaNAs/GaAs superlattice barrier”,
    M. Hosoe, S. Sato, S. Hiura, J. Takayama, A. Murayama,
    36th International Microprocesses and Nanotechnology Conference (MNC 2023), 17P-1-33, November 17, 2023, Keio Plaza Hotel Sapporo, Sapporo, JAPAN.
  4. “Temperature dependence of photoluminescence properties of dilute nitride InGaAsN quantum dots”,
    A. Morita, S. Hiura, J. Takayama, A. Murayama,
    36th International Microprocesses and Nanotechnology Conference (MNC 2023), 17P-1-37, November 17, 2023, Keio Plaza Hotel Sapporo, Sapporo, JAPAN.
  5. “Room temperature operation of spin-functional optical devices based on 0D-2D hybrid semiconductor nanostructures”,
    A. Murayama, S. Hiura,
    36th International Microprocesses and Nanotechnology Conference (MNC 2023) (Invited talk), 16D-3-1, November 16, 2023, Keio Plaza Hotel Sapporo, Sapporo, JAPAN.

2022

Publication

  1. “Thermo- and Mechano-triggered Luminescence ON/OFF Switching by Supercooled Liquid/Crystal Transition of Platinum(II) Complex Thin Films”,
    M. Yoshida, V. Sääsk, D. Saito, N. Yoshimura, J. Takayama, S. Hiura, A. Murayama, K. Põhako-Esko, A. Kobayashi, M. Kato:
    Advanced Optical Materials 10, 2102614:1-9 (2022). [doi]
  2. “Optical characterization and emission enhancement property of Ag nanomesh structure fabricated by nanosphere lithography”,
    M. Ugajin, S. Park, T. Kiba, J. Takayama, S. Hiura, A. Murayama, M. Kawamura, Y. Abe:
    Surface and Coatings Technology 435, 128258:1-8 (2022). [doi]
  3. “Efficient Room-Temperature Voltage Control of Picosecond Optical Spin Orientation Using a III-V Semiconductor Nanostructure”,
    S. Park, S. Hiura, J. Takayama, K. Sueoka, A. Murayama:
    Advanced Electronic Materials 8, 2200588:1-8 (2022). [doi]

International conference

  1. “Thickness effects of dilute GaAs nitride quantum wells on optical spin properties of tunnel-coupled InAs quantum dots”,
    S. Sato, M. Hosoe, S. Hiura, J. Takayama, A. Murayama:
    The 22nd International Vacuum Congress (IVC-22), Tue-J2-5, September 13, 2022, Sapporo Convention Center, Sapporo, JAPAN.
  2. “Structural and optical properties of InAs quantum dots capped with GaAs grown at different rates”,
    S. Izumi, S. Hiura, J. Takayama, A. Murayama:
    The 22nd International Vacuum Congress (IVC-22), Tue-PO1-36, September 13, 2022, Sapporo Convention Center, Sapporo, JAPAN.
  3. “Room-temperature operation characteristics of a spin-polarized light-emitting diode using InAs quantum dots tunnel-coupled with GaNAs”,
    K. Etou, S. Hiura, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama,
    2022 International Conference on Solid State Devices and Materials (SSDM2022), A-6-05, September 28, 2022, Makuhari Messe, Chiba, JAPAN.
  4. “Bias voltage and temperature dependence of electron-spin polarization in InAs quantum dots tunnel-coupled with a GaNAs quantum well”,
    S. Park, H. Kise, S. Hiura, J. Takayama, K. Sueoka, A. Murayama,
    2022 International Conference on Solid State Devices and Materials (SSDM2022), C-8-04, September 29, 2022, Makuhari Messe, Chiba, JAPAN.

2021

Publication

  1. “Electric-Field-Effect Spin Switching with an Enhanced Number of
    Highly Polarized Electron and Photon Spins Using p‑Doped
    Semiconductor Quantum Dots”,
    S. Park, H. Chen, S. Hiura, J. Takayama, K. Sueoka, A. Murayama:
    ACS Omega 6, 8561-8569 (2021). [doi]
  2. “Room-temperature electron spin polarization exceeding 90% in an opto-spintronic semiconductor nanostructure via remote spin filtering”,
    Y. Q. Huang, V. Polojärvi, S. Hiura, P. Höjer, A. Aho, R. Isoaho, T. Hakkarainen, M. Guina, S. Sato, J. Takayama, A. Murayama, I. A. Buyanova, W. M. Chen:
    Nature Photonics 15, 475-482 (2021). [doi] [PRESS RELEASE]
  3. “Room-Temperature Spin-Transport Properties in an In0.5Ga0.5As Quantum Dot Spin-Polarized Light-Emitting Diode”,
    K. Etou, S. Hiura, S. Park, K. Sakamoto, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama:
    Physical Review Applied 16, 014034:1-10 (2021). [doi] [PRESS RELEASE]

International conference

  1. “Photoelectric spin information conversion using semiconductor quantum dot”,
    S. Hiura, J. Takayama, A. Murayama:
    Joint Symposium of Engineering & Information Science & WPI-ICReDD in Hokkaido University (Invited), April 26, 2021, Online.
  2. “Electric-field control of electron-spin polarization degree at room temperature in opto-spintronic device using InGaAs quantum dots”,
    S. Park, S. Hiura, H. Chen, J. Takayama, K. Sueoka, A. Murayama,
    2021 International Conference on Solid State Devices and Materials (SSDM2021), I-1-06, Online.
  3. “Optical spin properties of InAs quantum dots tunnel-coupled with dilute nitride GaNAs”,
    S. Sato, Y. Nakamura, S. Park, S. Hiura, J. Takayama, A. Murayama,
    2021 International Conference on Solid State Devices and Materials (SSDM2021), H-4-04, Online.
  4. “Temperature effects on performances of a spin-polarized light emitting diode using p-doped InGaAs quantum dots”,
    K. Etou, S. Hiura, J. Takayama, S. Park, A. Subagyo, K. Sueoka, A. Murayama,
    2021 International Conference on Solid State Devices and Materials (SSDM2021), E-5-03, Online.

2020

Publication

  1. “Temperature dependence of inter-dot electron-spin transfer among laterally coupled excited states in high-density InGaAs quantum dots”,
    S. Sato, S. Hiura, J. Takayama, A. Murayama:
    Journal of Applied Physics 127, 043904:1-7 (2020). [doi]
  2. “Size Dependence of Emission Enhancement of Tris(8-hydroxyquinolinato) aluminum with Plasmonic Al Nanostructure”,
    N. Iijima, M. Ugajin, T. Kiba, M. Kawamura, Y. Abe, K.H. Kim, A. Higo, J. Takayama, S. Hiura, A. Murayama:
    Thin Solid Films 700, 137920:1-6 (2020). [doi]
  3. “Suppression of thermally excited electron-spin relaxation in InGaAs quantum dots using p-doped capping layers toward enhanced room-temperature spin polarization”,
    S. Sato, S. Hiura, J. Takayama, A. Murayama:
    Applied Physics Letters 116, 182401:1-5 (2020). [doi]
  4. “Asymmetric spin relaxation induced by residual electron spin in semiconductor quantum-dot-superlattice hybrid nanosystem”,
    S. Hiura, S. Hatakeyama, J. Takayama, A. Murayama:
    Applied Physics Letters 116, 262407:1-5 (2020). [doi]
  5. “Intense Red-Blue Luminescence Based on Superfine Control of Metal-Metal Interactions for Self-Assembled Platinum(II) Complexes”,
    D. Saito, T. Ogawa, M. Yoshida, J. Takayama, S. Hiura, A. Murayama, A. Kobayashi, M. Kato:
    Angewandte Chemie International Edition 59, 18723-18730 (2020). [doi]
  6. “Highly Efficient Room-Temperature Electron-Photon Spin Conversion Using a Semiconductor Hybrid Nanosystem with Gradual Quantum Dimensionality Reduction”,
    S. Hiura, M. Takishita, J. Takayama, S. Sato, A. Murayama:
    Physical Review Applied 14, 044011:1-9 (2020). [doi] [PRESS RELEASE]

International conference

  1. “Electron-spin dynamics in tunnel-coupled structures of InGaAs well and dot with different p-doping concentrations applied with electric field”,
    S. Park, H. Chen, S. Hiura, J. Takayama, A. Murayama,
    2020 International Conference on Solid State Devices and Materials (SSDM2020), H-4-02, Online.
  2. “Spin relaxation property after spin transfer from a semiconductor superlattice barrier to quantum dots”,
    S. Hatakeyama, S. Hiura, J. Takayama, A. Murayama,
    2020 International Conference on Solid State Devices and Materials (SSDM2020), K-5-04, Online.
  3. “Highly efficient electron-photon spin conversion using InGaAs quantum dots with p-doped capping barrier”,
    S. Sato, S. Hiura, J. Takayama, A. Murayama,
    2020 International Conference on Solid State Devices and Materials (SSDM2020), K-5-03, Online.
  4. “Fabrication of p-doped quantum dot spin-polarized light-emitting diodes”,
    K. Etou, S. Hiura, J. Takayama, A. Murayama,
    2020 International Conference on Solid State Devices and Materials (SSDM2020), H-8-02, Online

2019

Publication

  1. “Interdot carrier and spin dynamics in a two-dimensional high-density quantum-dot array of InGaAs with quantum dots embedded as local potential minima”,
    S. Hiura, M. Urabe, K. Takeishi, K. Itabashi, J. Takayama, T. Kiba, K. Sueoka, A. Murayama:
    Semiconductor Science and Technology 34, 025001:1-7 (2019). [doi]
  2. “Emission enhancement of tris(8-quinolinolato)aluminum with Al nanotriangle arrays fabricated by nanosphere lithography”,
    T. Kiba, N. Iijima, K. Yanome, M. Kawamura, Y. Abe, K.-H. Kim, M. Takase, A. Higo, J. Takayama, S. Hiura, A. Murayama:
    Applied Surface Science 478, 49-53 (2019). [doi]
  3. “Quantum spin transport to semiconductor quantum dots through superlattice”,
    S. Hiura, K. Itabashi, K. Takeishi, J. Takayama, T. Kiba, A. Murayama:
    Applied Physics Letters 114, 072406:1-5 (2019). [doi]
    (selected as an Editor’s Pick)
  4. “Electric field control of spin polarity in spin injection into InGaAs quantum dots from a tunnel-coupled quantum well”,
    H. Chen, S. Hiura, J. Takayama, S. Park, K. Sueoka, A. Murayama:
    Applied Physics Letters 114, 133101:1-5 (2019). [doi]
  5. “Electron-transfer-induced metallic electronic states in H/Fe3O4(001) film subsurface”,
    S. Hiura, A. Subagyo, A. Murayama, K. Sueoka:
    Applied Physics Express, 12, 055502:1-5 (2019). [doi]
  6. “Layer-selective spin amplification in size-modulated quantum nanocolumn”,
    S. Hiura, S. Saito, J. Takayama, T. Kiba, A. Murayama:
    Applied Physics Letters 115, 013102:1-5 (2019). [doi]
  7. “Photoluminescence of InGaAs/GaAs Quantum Nanodisk in Pillar Fabricated by Biotemplate, Dry Etching, and MOVPE Regrowth”,
    A. Higo, T. Kiba, J. Takayama, C.-Y. Lee, C. Thomas, T. Ozaki, H. Sodabanlu, M. Sugiyama, Y. Nakano, I. Yamashita, A. Murayama, S. Samukawa:
    ACS Applied Electronic Materials 1, 1945-1951 (2019). [doi] [PRESS RELEASE]
  8. “Enhanced hetero-dimensional electron-spin injection in a resonantly tunnel-coupled InGaAs quantum dot–well nanosystem”,
    H. Chen, S. Hiura, J. Takayama, S. Park, K. Sueoka, A. Murayama:
    Applied Physics Express 13, 015003:1-5 (2019). [doi]

International conference

  1. “Spin-conserved electron transport to InGaAs quantum dots through GaAs/AlGaAs superlattice”,
    S. Hiura, J. Takayama, T. Kiba, A. Murayama,
    Compound Semiconductor Week 2019 (CSW2019), MoP-E-8, May 20, 2019, Nara Kasugano International Forum, Nara, JAPAN.
  2. “Electric-field control of optical-spin injection from an InGaAs quantum well to p-doped quantum dots”,
    S. Park, H. Chen, J. Takayama, S. Hiura, A. Murayama,
    Compound Semiconductor Week 2019 (CSW2019), MoP-D-1, May 20, 2019, Nara Kasugano International Forum, Nara, JAPAN.
  3. “Effects of p-doping on excited spin states and the dynamics in InGaAs quantum dots”,
    S. Sato, M. Murakami, Y. Nakamura, S. Hiura, J. Takayama, A. Murayama,
    Compound Semiconductor Week 2019 (CSW2019), MoP-E-9, May 20, 2019, Nara Kasugano International Forum, Nara, JAPAN.
  4. “Effects of growth temperature of a capping layer on excited spin properties of In0.5Ga0.5As quantum dots”,
    Y. Nakamura, S. Hiura, S. Sato, J. Takayama, A. Murayama,
    Compound Semiconductor Week 2019 (CSW2019), TuP-A-4, May 21, 2019, Nara Kasugano International Forum, Nara, JAPAN.
  5. “Lateral electronic coupling among self-assembled semiconductor
    quantum dots promoted by adjoining tunnel-coupled quantum-well
    potentials”,
    J. Takayama, S. Hiura, K. Takeishi, T. Kiba, A. Murayama,
    Compound Semiconductor Week 2019 (CSW2019), TuC3-6, May 21, 2019, Nara Kasugano International Forum, Nara, JAPAN.
  6. “P-doping effects on temperature-dependent spin dynamics in InGaAs quantum dots”,
    S. Sato, S. Hiura, J. Takayama, A. Murayama,
    7th International Workshop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures (SemiconNano2019), P-01, September 25, 2019, Convention Hall of Integrated Research Center, Kobe University, Kobe, JAPAN.
  7. “Temperature-dependent spin dynamics in InGaAs quantum dots embedded with GaAs capping layer grown at low temperature”,
    Y. Nakamura, S. Hiura, S. Sato, J. Takayama, A. Murayama,
    7th International Workshop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures (SemiconNano2019), P-05, September 25, 2019, Convention Hall of Integrated Research Center, Kobe University, Kobe, JAPAN.
  8. “Electric-field-effect optical spin-injection device using p-doped InGaAs quantum dots”,
    S. Park, H. Chen, S. Hiura, J. Takayama, A. Murayama,
    7th International Workshop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures (SemiconNano2019), P-02, September 25, 2019, Convention Hall of Integrated Research Center, Kobe University, Kobe, JAPAN.
  9. “Temperature-persistent spin relaxation in InGaAs/GaAs dots-in-well structure”,
    M. Takishita, S. Hiura, J. Takayama, A. Murayama,
    7th International Workshop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures (SemiconNano2019), P-04, September 25, 2019, Convention Hall of Integrated Research Center, Kobe University, Kobe, JAPAN.
  10. “Temperature dependence of modal gain at excited states in high-density InGaAs quantum dots by variable stripe length method”,
    A. Ohtake, S. Hiura, J. Takayama, A. Murayama,
    7th International Workshop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures (SemiconNano2019), P-03, September 25, 2019, Convention Hall of Integrated Research Center, Kobe University, Kobe, JAPAN.
  11. “Size-modulation-induced spin amplification in quantum nanocolumns”,
    S. Hiura, S. Saito, J. Takayama, T. Kiba, A. Murayama,
    7th International Workshop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures (SemiconNano2019), O-05, September 25, 2019, Convention Hall of Integrated Research Center, Kobe University, Kobe, JAPAN.
  12. “Quantum spin transport to self-assembled InGaAs quantum dots through AlGaAs/GaAs superlattice”,
    S. Hiura, J. Takayama, T. Kiba, A. Murayama,
    Materials Research Meeting (MRM2019), E2-11-P18, December 11, 2019, Yokohama Symposia, Yokohama, JAPAN.

2018

Publication

  1. “Time-resolved photoluminescence study of tris(8-hydroxyquinolinato) aluminium with surface plasmon resonance of Ag nanoparticles”,
    K. Masui, T. Kiba, A. Sato, K. Yanome, M. Kawamura, Y. Abe, K.H. Kim, H.D. Kim, J. Takayama, A. Murayama:
    Thin Solid Films 660, 938-943 (2018). [doi]
  2. “Photoluminescence enhancement of tris(8-hydroxyquinolinato) aluminum thin film by plasmonic Ag nanotriangle array fabricated by nanosphere lithography”,
    K. Yanome, T. Kiba, K. Masui, M. Kawamura, Y. Abe, K.H. Kim, M. Takase, J. Takayama, A. Murayama:
    Thin Solid Films 660, 907-912 (2018). [doi]
  3. “Effect of a Phonon Bottleneck on Exciton and Spin Generation in Self-Assembled In1-xGaxAs Quantum Dots”,
    Y. Q. Huang, I. A. Buyanova, X. J. Yang, A. Murayama, W. M. Chen:
    Physical Review Applied 9, 044037:1-9 (2018). [doi]
  4. “分子線エピタキシーによる半導体自己組織化量子ドットの作製と光励起キャリアダイナミクス”,
    村山 明宏, 高山 純一, 樋浦 諭志, 木場 隆之:
    (依頼解説) 表面と真空 61, 315-324 (2018). [doi]
  5. “Magnetic field insensitive photoluminescence decay of ZnSe/CdS core/shell type-II colloidal quantum dots”,
    W. Lee, S. Park, A. Murayama, J. Lee, K. Kyhm:
    Japanese Journal of Applied Physics 57, 06HE06:1-4 (2018). [doi]
  6. “Temperature-dependent radiative and non-radiative dynamics of photo-excited carriers in extremely high-density and small InGaN nanodisks fabricated by neutral-beam etching using bio-nano-templates”,
    Y. Chen, T. Kiba, J. Takayama, A. Higo, T. Tanikawa, S. Chen, S. Samukawa, A. Murayama:
    Journal of Applied Physics 123, 204305:1-6 (2018). [doi]
  7. “Temperature dependence of the radiative recombination time in laterally coupled GaAs quantum dots”,
    H. Kim, A. Murayama, J. Kim, J. Song:
    Applied Surface Science 457, 497-500 (2018). [doi]
  8. “Interdot spin transfer dynamics in laterally coupled excited spin ensemble of high-density InGaAs quantum dots”,
    S. Hiura, K. Takeishi, M. Urabe, K. Itabashi, J. Takayama, T. Kiba, K. Sueoka, A. Murayama:
    Applied Physics Letters 113, 023104:1-5 (2018). [doi]
  9. “Carrier Relaxation Dynamics Between Localized Vertical Confinement States in GaAs/AlGaAs Quantum Rings”,
    S. Park, J. Kim, J. Takayama, A. Murayama, K. Kyhm:
    Journal of the Korean Physical Society 73, 314-319 (2018). [doi]
  10. “Persistent high polarization of excited spin ensembles during light emission in semiconductor quantum-dot-well hybrid nanosystems”,
    K. Takeishi, S. Hiura, J. Takayama, K. Itabashi, M. Urabe, A. Washida, T. Kiba, A. Murayama:
    Physical Review Applied 10, 034015:1-8 (2018). [doi] [PRESS RELEASE]

International conference

  1. “Persistent high spin polarization induced by interdot spin transfer among coupled excited states of InGaAs quantum dots”,
    S. Hiura, K. Takeishi, A. Washida, J. Takayama, A. Ohtake, M. Takishita, S. Saito, A. Murayama,
    The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials (EXCON2018), O27, July 10, 2018, Nara Kasugano International Forum, Nara, JAPAN.
  2. “Influence of vertical interdot coupling on energy-dependent modal gain of InGaAs quantum dots”,
    A. Ohtake, A. Washida, S. Hiura, J. Takayama, M. Takishita, S. Saito, A. Murayama,
    The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials (EXCON2018), PO044, July 10, 2018, Nara Kasugano International Forum, Nara, JAPAN.
  3. “Temperature-dependent spin dynamics in InGaAs/GaAs dots-in-well structure”,
    M. Takishita, K. Takeishi, S. Hiura, J. Takayama, A. Washida, A. Ohtake, S. Saito, A. Murayama,
    The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials (EXCON2018), PO110, July 12, 2018, Nara Kasugano International Forum, Nara, JAPAN.
  4. “High-temperature carrier dynamics responsible for a non-radiative process in InGaN nanodisks fabricated by top-down nanotechnology”,
    Y. Chen, T. Kiba, J. Takayama, A. Higo, T. Tanikawa, S. Samukawa, A. Murayama,
    The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials (EXCON2018), PO115, July 12, 2018, Nara Kasugano International Forum, Nara, JAPAN.
  5. “Effects of electrical field on circularly polarized photoluminescence in InGaAs-based coupled nanostructures of quantum dots and a well”,
    H. Chen, J. Takayama, S. Hiura, A. Subagyo, K. Sueoka, A. Murayama,
    The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials (EXCON2018), PO120, July 12, 2018, Nara Kasugano International Forum, Nara, JAPAN.
  6. “Electron-spin transport and spin relaxation in III-V compound semiconductor barrier layers integrated with self-assembled quantum dots”,
    A. Murayama, S. Hiura, J. Takayama,
    2nd JSPS workshop on Japan-Sweden frontiers in photon and spin functionalities of nanomaterials, O-1, October 24, 2018, Sekisuitei, Noboribetsu, JAPAN.
  7. “Interdot spin transfer dynamics in vertically coupled InGaAs quantum dots”,
    S. Hiura, J. Takayama, T. Kiba, A. Murayama,
    2nd JSPS workshop on Japan-Sweden frontiers in photon and spin functionalities of nanomaterials, O-2, October 24, 2018, Sekisuitei, Noboribetsu, JAPAN.
  8. “Electric-field effects on spin polarity of In0.5Ga0.5As quantum dots after spin injection from In0.1Ga0.9As quantum wells”,
    H. Chen, J. Takayama, S. Hiura, K. Sueoka, A. Murayama,
    2nd JSPS workshop on Japan-Sweden frontiers in photon and spin functionalities of nanomaterials, O-5, October 24, 2018, Sekisuitei, Noboribetsu, JAPAN.
  9. “Temperature dependence of spin dynamics at laterally coupled excited states of InGaAs quantum dots”,
    S. Sato, S. Hiura, J. Takayama, A. Murayama,
    2nd JSPS workshop on Japan-Sweden frontiers in photon and spin functionalities of nanomaterials, P-1, October 24, 2018, Sekisuitei, Noboribetsu, JAPAN.
  10. “Influence of multilayer stacking on spin dynamics at excited states of vertically coupled InGaAs quantum dots”,
    S. Saito, S. Hiura, J. Takayama, A. Murayama,
    2nd JSPS workshop on Japan-Sweden frontiers in photon and spin functionalities of nanomaterials, P-4, October 24, 2018, Sekisuitei, Noboribetsu, JAPAN.
  11. “Investigation of modal gain at excited states in high-density InGaAs quantum dots by variable stripe length method”,
    A. Ohtake, S. Hiura, J. Takayama, A. Murayama,
    2nd JSPS workshop on Japan-Sweden frontiers in photon and spin functionalities of nanomaterials, P-6, October 24, 2018, Sekisuitei, Noboribetsu, JAPAN.
  12. “Temperature-dependent spin polarization and its dynamics in InGaAs quantum dots embedded in a GaAs quantum well”,
    M. Takishita, S. Hiura, J. Takayama, A. Murayama,
    2nd JSPS workshop on Japan-Sweden frontiers in photon and spin functionalities of nanomaterials, P-9, October 24, 2018, Sekisuitei, Noboribetsu, JAPAN.
  13. “Distribution analysis of photoluminescence decay time and related non-radiative processes in In0.3Ga0.7N nanodisks”,
    Y. Chen, T. Kiba, J. Takayama, A. Murayama,
    2nd JSPS workshop on Japan-Sweden frontiers in photon and spin functionalities of nanomaterials, P-11, October 24, 2018, Sekisuitei, Noboribetsu, JAPAN.
  14. “Excited Spin Engineering of In0.5Ga0.5As Quantum Dots by an Adjacent Two-Dimensional In0.1Ga0.9As Quantum Well Potential”,
    S. Hiura, K. Takeishi, J. Takayama, T. Kiba, A. Murayama,
    31st International Microprocesses and Nanotechnology Conference (MNC 2018), 14D-2-2, November 14, 2018, Sapporo Park Hotel, Sapporo, JAPAN.
  15. “Optical Study on Thermal Activation Processes of Carrier Dynamics in In0.3Ga0.7N Nanodisks”,
    Y. Chen, T. Kiba, J. Takayama, A.Higo, T. Tanikawa, S. Samukawa, A. Murayama,
    31st International Microprocesses and Nanotechnology Conference (MNC 2018), 15P-7-51, November 15, 2018, Sapporo Park Hotel, Sapporo, JAPAN.
  16. “Modal Gain at Excited States in High-Density InGaAs Quantum Dots Investigated by Variable Stripe Length Method”,
    A. Ohtake, S. Hiura, A. Washida, J. Takayama, A. Murayama,
    31st International Microprocesses and Nanotechnology Conference (MNC 2018), 15P-7-52, November 15 2018, Sapporo Park Hotel, Sapporo, JAPAN.
  17. “Temperature-Persistent High Spin Polarization and Its Dynamics in InGaAs Quantum Dots Embedded in a GaAs Quantum Well”,
    M. Takishita, S. Hiura, J. Takayama, A. Murayama,
    31st International Microprocesses and Nanotechnology Conference (MNC 2018), 15P-7-53, November 15, 2018, Sapporo Park Hotel, Sapporo, JAPAN.
  18. “Electric-Field Optical Device Controlling Electron-Spin Polarity of InGaAs Quantum Dots”,
    H. Chen, J. Takayama, S. Hiura, K. Sueoka, A. Murayama,
    31st International Microprocesses and Nanotechnology Conference (MNC 2018), 16P-11-16, November 16, 2018, Sapporo Park Hotel, Sapporo, JAPAN.
  19. “Temperature Dependence of Interdot Spin Dynamics in Laterally Coupled InGaAs Quantum Dots”,
    S. Sato, S. Hiura, J. Takayama, A. Murayama,
    31st International Microprocesses and Nanotechnology Conference (MNC 2018), 16P-11-64, November 16, 2018, Sapporo Park Hotel, Sapporo, JAPAN.

2017

Publication

  1. “Direct observation of subsurface charge ordering in Fe3O4(001) by scanning tunneling microscopy/spectroscopy”,
    S. Hiura, A. Ikeuchi, M. Jochi, R. Yamazaki, S. Takahashi, A. Subagyo, A. Murayama, K. Sueoka:
    Applied Physics Express 10, 045701:1-3 (2017). [doi]
  2. “Spectroscopic and Photoluminescent Properties of Indium Zinc Oxide (IZO) and IZO/Ag/IZO Sandwiched Film”,
    K. Yanome, T. Kiba, M. Kawamura, Y. Abe, K.H. Kim, J. Takayama, A. Murayama:
    Journal of ELECTRONIC MATERIALS 46, 3873-3879 (2017). [doi]
  3. “Optical Study of Sub-10 nm In0.3Ga0.7N Quantum Nanodisks in GaN Nanopillars”,
    A. Higo, T. Kiba, S. Chen, Y. Chen, T. Tanikawa, C. Thomas, C.Y. Lee, Y.C. Lai, T. Ozaki, J. Takayama, I. Yamashita, A. Murayama, S. Samukawa:
    ACS Photonics 4, 1851-1857 (2017). [doi]
  4. “Excitation polarization dependence of optical coupled exciton states in a single coupled quantum dot molecule”,
    H. Kim, A. Murayama, K. Kyhm, J. Kim, J. Song, K.C. Je:
    Journal of Physics: Conference Series 906, 012006:1-4 (2017). [doi]

International conference

  1. “Optically coupled excitons in a single coupled-quantum-dot structure via dipole-dipole interaction”,
    H. D. Kim, A. Murayama, K. Kyhm, R. A. Taylor, J. S. Kim,
    20th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON20), TuP03, July 18, 2017, Hyatt Regency Buffalo Hotel and Conference Center, Buffalo, USA.
  2. “Spin-functional photoelectric conversion using InGaAs quantum dots”,
    Akihiro Murayama,
    STINT/JSPS summer workshop 2017, August 10, 2017, Viking line cruise between Stockholm-Helsinki, Sweden-Finland.
  3. “Optical spin-injection dynamics in high-density InGaAs quantum dot”,
    Satoshi Hiura,
    STINT/JSPS summer workshop 2017, August 10, 2017, Viking line cruise between Stockholm-Helsinki, Sweden-Finland.
  4. “Time-resolved Photoluminescence Study of Alq3 Thin Film with Plasmonic Ag Nanotriangle Array Fabricated by Nanosphere Lithography”,
    K. Yanome, T. Kiba, K. Masui, M. Kawamura, Y. Abe, K. H. Kim, M. Takase, J. Takayama, A. Murayama,
    International Thin Films Conference, B-P-0134, October 17, 2017, National Dong Hwa University, Hualien, TAIWAN.
  5. “Emission Enhancement and its dynamics of Alq3 with Surface Plasmon Resonance of Ag Nanoparticles”,
    K. Masui, T. Kiba, A. Sato, K. Yanome, M. Kawamura, Y. Abe, K. H. Kim, H. D. Kim, J. Takayama, A. Murayama,
    International Thin Films Conference, C-P-0141, October 17, 2017, National Dong Hwa University, Hualien, TAIWAN.
  6. “Effect of Adsorbed H Atoms on Surface and Subsurface Fe Electronic States in Magnetite Film”,
    Satoshi Hiura,
    7th Annual World Congress of Nano Science & Technology (Nano-S&T 2017), Session 202 (Invited talk), October 24, 2017, Hilton Fukuoka Sea Hawk, Fukuoka, JAPAN.
  7. “Spin transfer dynamics in III-V compound semiconductor quantum dots integrated with layered quantum structures”,
    Akihiro Murayama,
    The 30th International Microprocesses and Nanotechnology Conference (MNC2017) (Invited talk), November 6-9, 2017, Ramada Plaza JeJu Hotel, Jeju, KOREA.

2016

Publication

  1. “Temperature-dependent spin injection dynamics in InGaAs/GaAs quantum well-dot tunnel-coupled nanostructures”,
    S.L. Chen, T. Kiba, X. J. Yang, J. Takayama, A. Murayama:
    Journal of Applied Physics 119, 115701:1-5 (2016). [doi]
  2. “Power-dependent spin amplification in (In, Ga)As/GaAs quantum well via Pauli blocking by tunnel-coupled quantum dot ensembles”,
    S.L. Chen, T. Kiba, X. J. Yang, J. Takayama, A. Murayama:
    Applied Physics Letters 108, 152103:1-4 (2016). [doi]
  3. “Temperature-Dependent Operation of GaAs Quantum Nanodisk LEDs with Asymmetric AlGaAs Barriers”,
    Y. Tamura, A. Higo, T. Kiba, C. Thomas, J. Takayama, I. Yamashita, A. Murayama, S. Samukawa:
    IEEE TRANSACTIONS ON NANOTECHNOLOGY, 15, 557-562 (2016). [doi]
  4. “Emission Enhancement in Indium Zinc Oxide(IZO)/Ag/IZO Sandwiched Structure Due to Surface Plasmon Resonance of Thin Ag Film”,
    T. Kiba, K. Yanome, M. Kawamura, Y. Abe, K.H. Kim, J. Takayama, A. Murayama:
    Applied Surface Science 389, 906–910 (2016). [doi]
  5. “Nanometer Scale Fabrication and Optical Response of InGaN/GaN Quantum Disks”,
    L.Y. Chun, A. Higo, T. Kiba, C. Thomas, S.L. Chen, C.Y. Lee, T. Tanikawa, S. Kuboya, R. Katayama, K. Shojiki, J. Takayama, I. Yamashita, A. Murayama, G.C. Chi, P. Yu, S. Samukawa:
    Nanotechnology 27, 425401:1-5 (2016). [doi]

International conference

  1. “Transient photoluminescence study on spin dynamics in InGaAs-based coupled nanostructures of quantum dots with quantum wells”,
    K. Takeishi, S.L. Chen, J. Takayama, K. Itabashi, M. Urabe, A. Murayama,
    16th IEEE International Conference on Nanotechnology, No.41, August 23, 2016, Sendai International Center, Sendai, JAPAN.
  2. “Growth optimization of spin-transport barriers used for spin-polarized light-emitting diodes based on InGaAs quantum dots”,
    K. Itabashi, K. Takeishi, M. Urabe, J. Takayama, S.L. Chen, A. Murayama,
    16th IEEE International Conference on Nanotechnology, No.42, August 23, 2016, Sendai International Center, Sendai, JAPAN.
  3. “Transient photoluminescence in InGaN nano-disks fabricated by nano-scale neutral-beam etching utilizing bio-nano templates”,
    Y. Chen, S.L. Chen, T. Kiba, C.Y. Lee, C. Thomas, Y.C. Lai, A. Higo, S. Samukawa, A. Murayama:
    16th IEEE International Conference on Nanotechnology, No.44, August 23, 2016, Sendai International Center, Sendai, JAPAN
  4. “Ultrahigh-density self-assembled quantum dots of InGaAs and suppression of optical state-filling effect”,
    M. Urabe, K. Takeishi, J. Takayama, K. Itabashi, S.L. Chen, A. Murayama,
    16th IEEE International Conference on Nanotechnology, No.54, August 23, 2016, Sendai International Center, Sendai, JAPAN
  5. “Electric-field control of spin states in InGaAs-based coupled nanostructures of quantum dots and well”,
    Y. Akei, J. Takayama, K. Takeishi, K. Itabashi, M. Urabe, A. Murayama,
    16th IEEE International Conference on Nanotechnology, No.83, August 23, 2016, Sendai International Center, Sendai, JAPAN
  6. “Pump-probe study of temperature-dependent spin relaxation in GaAs quantum disks fabricated by fully top-down lithography using Bio-templates”,
    T. Kiba, T. Tanaka, A. Higo, C. Thomas, Y. Tamura, S. Samukawa, A. Murayama,
    16th IEEE International Conference on Nanotechnology, No.92, August 23, 2016, Sendai International Center, Sendai, JAPAN
  7. “Optical spin-functional electronics utilizing semiconductor quantum dots; toward stable room-temperature operation”,
    A. Murayama, S.L. Chen, T. Kiba, J. Takayama, and K. Sueoka,
    JSPS workshop on Japan-Sweden frontiers in spin and photon functionalities of semiconductor nanostructures , p.4-5, August 30, 2016, Jyozankei Grand Hotel, Sapporo, Hokkaido, Japan
  8. “Spin-Functional Photoelectric Conversion Utilizing III-V Compound Semiconductor Quantum Dots”
    Akihiro Murayama,
    6th Annual World Congress of Nano Science & Technology (Nano-S&T 2016), Session 102 (Invited talk), October 27, 2016, Holiday Inn Singapore Atrium, Singapore
  9. “Fabrication of GaAs quantum nanodisk by bio-template, neutral beam etching, and asymmetric AlGaAs barrier regrowth and its optical response”(Oral)
    A. Higo, Y. Chen, T. Kiba, C. Thomas, J. Takayama, A. Imoto, S. Miyazaki, T. Kamikawa, M. Tanaka, I. Yamashita, Y. Wang, H. Sodabanlu, M. Sugiyama, Y. Nakano, A. Murayama, S. Samukawa
    SPIE Photonics WEST 2017, 10116-25 (Oral presentation), 1 February 2017, San Francisco, USA.

2015

Publication

  1. “Electron g-factor and spin decoherence in GaAs quantum nanodisks fabricated by fully top-down lithography”,
    T. Tanaka, T. Kiba, A. Higo, C. Thomas, Y. Tamura, S. Samukawa, A. Murayama:
    Journal of Crystal Growth 425, 295-298 (2015).
  2. “Size dependence of electron spin dephasing in InGaAs quantum dots”,
    Y. Q. Huang, Y. Puttisong, I.A. Buyanova, X.J. Yang, A. Subagyo, K. Sueoka, A. Murayama, W.M. Chen:
    Applied Physics Letters 106, 093109:1-4 (2015).
  3. “Light-emitting devices based on top-down fabricated GaAs quantum nanodisks”,
    A. Higo, T. Kiba, Y. Tamura, C. Thomas, J. Takayama, Y. Wang, H. Sodabanlu, M. Sugiyama, Y. Nakano, I. Yamashita, A. Murayama, S. Samukawa:
    Scientific Reports (Nature publishing group) 5, 9371:1-8 (2015).
  4. “Polarization anisotropy of exciton in self-assembled elliptical InP/InGaP quantum dots”,
    I. Kim, T. Kiba, A. Murayama, J.D. Song, K. Kyhm:
    Current Applied Physics 15, 733-738 (2015).
  5. “Time-resolved measurements of Cooper-pair radiative recombination in InAs quantum dots”,
    S.S. Mou, H. Irie, Y. Asano, K. Akahane, H. Nakajima, H. Kumano, M. Sasaki, A. Murayama, I. Suemune:
    Journal of Applied Physics 118, 073102:1-7 (2015).
  6. “Optical observation of superconducting density of states in luminescence spectra of InAs quantum dots”,
    S.S. Mou, H. Irie, Y. Asano, K. Akahane, H. Nakajima, H. Kumano, M. Sasaki, A. Murayama, I. Suemune:
    Physical Review B 92, 035308:1-9 (2015).
  7. “Tuning of the electron g-factor in defect free GaAs nano-disks”,
    L.W. Yang, Y.C. Tsai, Y. Li, A. Higo, A. Murayama, S. Samukawa, O. Voskoboynikov:
    Physical Review B 92, 245423:1-9 (2015).

International conference

  1. “Optical study of temperature-dependent spin injection and relaxation dynamics in InGaAs quantum well-quantum dot tunnel-coupled structure”,
    S.L. Chen, T. Kiba, X.J. Yang, J. Takayama, A. Murayama:
    17th International Conference on Modulated Semiconductor Structures, Th-PM-23, July 30 (2015), Sendai International Center, Sendai, Japan.
  2. “Temperature dependences of spin-injection dynamics and spin-polarized electroluminescence in InGaAs quantum dots”,
    Y. Nomura, Y. Akei, J. Takayama, T. Kiba, A. Subagyo, T. Yamamura, D. Yamazaki, K. Sueoka, A. Murayama:
    47th International Conference on Solid State Devices and Materials, PS-12-19, September 29 (2015), Sapporo Convention Center, Sapporo, Japan.
  3. “High-density self-assembled quantum dots of InGaAs for ultrafast and efficient spin injection”,
    J. Takayama, T. Kiba, T. Yamamura, D. Yamazaki, S.L. Chen, A. Murayama:
    47th International Conference on Solid State Devices and Materials, G-3-1 (Oral presentation), September 29 (2015), Sapporo Convention Center, Sapporo, Japan.
  4. “Effect of remote doping on photoluminescence and carrier spin dynamics in InGaAs quantum dots”,
    D. Yamazaki, S.L. Chen, J. Takayama, A. Murayama:
    47th International Conference on Solid State Devices and Materials, PS-8-12, September 29 (2015), Sapporo Convention Center, Sapporo, Japan.
  5. “Phonon-assisted efficient spin injection in InGaAs quantum well-quantum dot tunnel-coupled structures”,
    S.L. Chen, T. Kiba, J. Takayama, A. Murayama:
    47th International Conference on Solid State Devices and Materials, P-3-3 (Oral presentation), September 29 (2015), Sapporo Convention Center, Sapporo, Japan.
  6. “Room temperature operation of GaAs/AlGaAs quantum nanodisks light emitting diodes fabricated by fusion of bio-template and neutral beam etching”,
    Y.C. Lai, A. Higo, C. Thomas, T. Kiba, J. Takayama, M. Sugiyama, Y. Nakano, P. Yu, A. Murayama, S. Samukawa:
    47th International Conference on Solid State Devices and Materials, PS-12-16, September 29 (2015), Sapporo Convention Center, Sapporo, Japan.
  7. “Fabrication of InGaN/GaN nanodisk structure by using bio-template and neutral beam etching process”,
    Y.C. Lai, A. Higo, C.Y. Lee, C. Thomas, T. Tanikawa, K. Shojiki, S. Kuboya, R. Katayama, T. Kiba, P. Yu, I. Yamashita, A. Murayama, S. Samukawa:
    15th International IEEE Conference on Nanotechnology, Th1C (Oral presentation), July 30 (2015), Angelicum Congress Centre, Rome, Italy.
  8. “InGaN Quantum Nanodisks fabrication by Bio-Template and Neutral Beam etching”,
    Y.C. Lai, A. Higo, C. Thomas, C.Y. Lee, T. Tanikawa, K. Shojiki, S. Kuboya, R. Katayama, T. Kiba, I. Yamashita, A. Murayama, P. Yu, Seiji Samukawa:
    American Vacuum Society – AVS 62nd International Symposium and Exhibition, PS+SS+TF-FrM-10, October 23, 2015, San Jose Convention Center, San Jose, USA.
  9. “Electron behavior under characteristic magnetic fields applied to inductively coupled plasmas for control of charged particle transport”,
    H. Sugawara:
    XVIII International Workshop on Low-Energy Positron and Positronium Physics / XIX International Symposium on Electron-Molecule Collisions and Swarms (POSMOL 2015) TLP9/TLE9 (Invited, Topical Lecture), July 19, 2015, Universidade Nova de Lisboa, Lisboa, Portugal.
  10. “Fundamental study on filter effect of confronting divergent magnetic fields applied to a low-pressure inductively coupled plasma”,
    H. Sugawara:
    9th International Conference on Reactive Plasmas / 68th Annual Gaseous Electronics Conference (American. Physical Society) / 33rd Symposium on Plasma Processing KW2.00001 (Invited), October 14, 2015, Hawaii Convention Center, Hawaii, USA.
  11. “Modeling on discharge mechanism of DC-magnetron”,
    S. Ogata and H. Sugawara:
    13th International Symposium on Sputtering and Plasma Processes, No. FS2-6p, July 8-10, 2015 Kyoto Research Park, Kyoto, Japan.

2014

Publication

  1. “Ultrafast spin tunneling and injection in coupled nanostructures of InGaAs quantum dots and quantum well”, X.J. Yang, T. Kiba, T. Yamamura, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama: Applied Physics Letters 104, 012406:1-4 (2014).
  2. “Temperature dependence of the radiative recombination time in ZnO nanorods under an external magnetic field of 6T”, W. Lee, T. Kiba, A. Murayama, C. Sartel, V. Sallet, I. Kim, R.A. Taylor, Y. D. Jho, K. Kyhm: OPTICS EXPRESS 22, 17959-17967 (2014).
  3. “Growth-temperature dependence of optical spin-injection dynamics in self-assembled InGaAs quantum dots”, T. Yamamura, T. Kiba, X.-j. Yang, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama: Journal of Applied Physics 116, 094309:1-7 (2014).
  4. “Anomalous spectral dependence of optical polarization and its impact on spin detection in InGaAs/GaAs quantum dots”, Y. Puttisong, Y. Haung, I. Buyanova, X.J. Yang, A. Subagyo, K. Sueoka, A. Murayama, W.M. Chen: Applied Physics Letters 105, 132106:1-4 (2014).
  5. “Impact of artificial lateral quantum confinement on exciton-spin relaxation in a two dimensional GaAs electronic system”, T. Kiba, T. Tanaka, Y. Tamura, A. Higo, C. Thomas, S. Samukawa, A. Murayama: AIP Advances 4, 107112:1-7 (2014).
  6. “Preparation and biocompatibilities of luminescent europium-doped yttria and titania nanoparticles”, S. Abe, Y. Hamba, A. Hyono, S. Yamagata, M. Uo, J. Iida, T. Kiba, A. Murayama, T. Akasaka, F. Watari: Journal of the Ceramic Society of Japan 122, 216-221 (2014).
  7. “Photophysical properties and biocopatibility of photoluminescent Y2O3:Eu nanoparticles in PMMA matrix”, S. Abe, Y. Hamba, N. Iwadera, S. Yamagata, Y. Yawaka, M. Uo, J. Iida, T. Kiba, A. Murayama, F. Watari: Journal of Nanoscience and Nanotechnology 14, 2891-2894 (2014).
  8. “Effect of substrate bias on production and transport of etchant ions in a magnetic neutral loop discharge plasma”, Y. Asami and H. Sugawara: IEEE Transactions on Plasma Science 42, 2540-2541 (2014).
  9. “Structure and energy deposition process of an inductively coupled plasma under confronting divergent magnetic fields”, Y. Minami, Y. Asami, and H. Sugawara: IEEE Transactions on Plasma Science 42, 2550-2551 (2014).

International conference

  1. “Full 3D quantum energy level simulation for GaAs/AlGaAs quantum nanodisks fabricated by ultimate top-down pocess”, S. Ishii, A. Higo, Y. Tamura, T. Kiba, A. Murayama, Y. Li, S. Samukawa: 3rd International Symposium on Next-Generation Electronics, E1-4 (Oral presentation), May 10 (2014), Chang Gung University, Taoyuan, Taiwan.
  2. “GaAs/AlGaAs stacked layers etched by neutral beam for the fabrication of quantum dot structures”, Y. Tamura, C. Thomas, A. Higo, T. Kiba, A. Murayama, S. Samukawa: 3rd International Symposium on Next-Generation Electronics, O1-2 (Oral presentation), May 10 (2014), Chang Gung University, Taoyuan, Taiwan.
  3. “Dynamics of photo-excited carriers and spin-related phenomena in III-V semiconductor nanostructures”, A. Murayama: IEEE 6th International Nanoelectronics Conference (Invited talk), July 29, (2014) Conference Hall, Hokkaido University, Sapporo, Hokkaido, Japan.
  4. “Ultrafast carrier capture in high optical quality GaAs nanodisks fabricated by bio-nano templates and damage-free neutral-beam etching”, T. Kiba, A. Higo, Y. Tamura, C. Thomas, S. Samukawa, A. Murayama: 6th IEEE International Nanoelectronics Conference, July 29 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  5. “Longitudinal and transvers electron-spin relaxation times in GaAs nanodisks fabricated by bio-nano templates and damage-free neutral-beam etching”, T. Tanaka, T. Kiba, Y. Tamura, C. Thomas, A. Higo, S. Samukawa, A. Murayama: 6th IEEE International Nanoelectronics Conference, July 29 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  6. “Ultrafast spin tunneling from a 2-dimesional electron system into self-assembled quantum dots of InGaAs”, T. Yamamura, T. Kiba, X.J. Yang, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama: 6th IEEE International Nanoelectronics Conference, July 29 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  7. “Effects of electric field on carrier and spin dynamics in InGaAs-based coupled quantum structures”, J. Takayama, T. Kiba, T. Yamamura, Y. Nomura, A. Subagyo, K. Sueoka, A. Murayama: 6th IEEE International Nanoelectronics Conference, July 29 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  8. “Electrical spin injection in light-emitting diodes with InGaAs-based quantum structures”, Y. Nomura, T. Kiba, J. Takayama, Y. Sasaki, T. Yamamura, A. Subagyo, K. Sueoka, A. Murayama: 6th IEEE International Nanoelectronics Conference, July 29 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  9. “Quantum energy levels simulation for InGaAs/GaAs quantum nanodisks fabricated by ultimate top-down process”, S. Ishii, A. Higo, K. Yoshikawa, Y. Tamura, T. Kiba, A. Murayama, Y. Li, S. Samukawa: 6th IEEE International Nanoelectronics Conference, July 29 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  10. “New origins of lasing in ZnO; temperature dependence of modal gain contour map”, C. Cho, A. Murayama, K. Kyhm: 6th IEEE International Nanoelectronics Conference (Oral presentation), July 30 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  11. “GaAs/AlGaAs quantum nanodisks by using neutral beam etching and their optical response”, Y. Tamura, A. Higo, T. Kiba, C. Thomas, T. Okada, W. Yunpeng, H. Sodabanlu, M. Sugiyama, Y. Nakano, A. Murayama, S. Samukawa: 6th IEEE International Nanoelectronics Conference, July 30 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  12. “Optical characteristics of GaAs quantum nanodisks by the combination of bio-template ultimate top-down process”, A. Higo, T. Kiba, Y. Tamura, S. Ishii, C. Thomas, T. Ozaki, A. Murayama, S. Samukawa: 6th IEEE International Nanoelectronics Conference, July 30 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  13. “Fabrication of InGaAs quantum nanodisk by using Bio-template and neutral beam etching processes”, K. Yoshikawa, A. Higo, C.Y. Lee, Y. Tamura, C. Thomas, T. Kiba, S. Ishii, H. Sodabanlu, Y. Wang, M. Sugiyama, Y. Nakano, I. Yamashita, A. Murayama, S. Samukawa: 6th IEEE International Nanoelectronics Conference, July 30 (2014), Hokkaido University Conference Hall, Sapporo, Japan.
  14. “Fabrication of InGaAs quantum nanodisk array by using bio-template and top-down etching processes”, K. Yoshikawa, A. Higo, C.Y. Lee, Y. Tamura, C. Thomas, T. Kiba, S. Ishii, H. Sodabanlu, Y. Wang, M. Sugiyama, Y. Nakano, I. Yamashita, A. Murayama, S. Samukawa: 14th IEEE International Conference on Nanotechnology, August 19 (2014), Eaton Chelsea Hotel, Toronto, Canada.
  15. “Narrow line-width photoluminescence spectrum of GaAs nanodisks fabricated using bio-template ultimate top-down processes”, Y. Tamura, A. Higo, T. Kiba, C. Thomas, Y. Wang, H. Sodabanlu, I. Yamashita, M. Sugiyama, Y. Nakano, A. Murayama, S. Samukawa: 14th IEEE International Conference on Nanotechnology, August 19 (2014), Eaton Chelsea Hotel, Toronto, Canada.
  16. “Quantum GaAs nanodisk light emitting diode fabricated by ultimate top-down neutral beam etching”, Y. Tamura, C. Thomas, T. Kiba, Y. Wang, H. Sodabanlu, J. Takayama, M. Sugiyama, Y. Nakano, I. Yamashita, A. Murayama, S. Samukawa: 24th International Semiconductor Laser Conference, September 9 (2014), Palma, Spain.
  17. “Suppression of exciton-spin relaxation induced by artificial lateral quantum confinement in GaAs”, T. Kiba, T. Tanaka, Y. Tamura, C. Thomas, T. Kaizu, Y. Okada, S. Samukawa, A. Murayama: 18th International Conference on Molecular Beam Epitaxy, FrC1-4 (Oral presentation), September 12 (2014), High Country Conference Center, Flagstaff, USA.
  18. “Electron g-factor and spin-relaxation in GaAs quantum disks fabricated by fully top-down lithography”, T. Tanaka, T. Kiba, Y. Tamura, A. Higo, S. Samukawa, A. Murayama: 18th International Conference on Molecular Beam Epitaxy, P26, September 8 (2014), High Country Conference Center, Flagstaff, USA.
  19. “Electrical spin injection from Fe electrodes into InGaAs-based quantum structures”, Y. Nomura, J. Takayama, T. Kiba, Y. Sasaki, T. Yamamura, X. Yang, A. Subagyo, K. Sueoka, A. Murayama: 18th International Conference on Molecular Beam Epitaxy, P121, September 11 (2014), High Country Conference Center, Flagstaff, USA.
  20. “Effects of spin density on the spin-tunneling dynamics from a quantum well into self-assembled quantum dots of InGaAs”, T. Yamamura, T. Kiba, X. Yang, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama: 18th International Conference on Molecular Beam Epitaxy, P122, September 11 (2014), High Country Conference Center, Flagstaff, USA.
  21. “Optimization of growth conditions of self-assembled InGaAs quantum dots suitable for spin injection”, J. Takayama, T. Yamamura, X. Yang, T. Kiba, A. Subagyo, K. Sueoka, A. Murayama: 18th International Conference on Molecular Beam Epitaxy, P123, September 11 (2014), High Country Conference Center, Flagstaff, USA.
  22. “Crystal growth of III-V compound semiconductor nanostructures and transient spin-related optical phenomena”, Collaborative Conference on Crystal Growth (3CG2014), (Invited talk), November 4 (2014), Holiday Inn Resort Phuket, Phuket, Thailand
  23. “Top-down InGaAs/GaAs nanopillars fabrication using a bio-nano process and a neutral beam etching process”, C. Thomas, K. Yoshikawa, C.Y. Lee, Y. Tamura, A. Higo, T. Kiba, A. Murayama, I. Yamashita, S. Samukawa: American Vacuum Society – AVS 61st. International Symposium and Exhibition, PS-ThA8, November 13 (2014), Baltimore, USA.
  24. “Monte Carlo simulation of electron diffusion across separatrix between confronting divergent magnetic fields”, H. Sugawara, Y. Minami, S. Ogino: XXII Europhysics Conference on Atomic and Molecular Physics of Ionized Gases, P1-02-04, July 15-19, 2014, Greifswald, Germany.

2013

 Publication

  1. “High-density optical spin injection in self-assembled semiconductor quantum dots”, A. Murayama, N. Tamura, T. Yamazaki, T. Kiba: Journal of Luminescence 133, 110-113 (2013).
  2. “Dynamics of electron-spin injection in a heterovalent GaAs/AlGaAs/ZnMnSe structure with a coupled double quantum well of GaAs/AlGaAs”, Y. Kuno, T. Sasaki, T. Kiba, V.Kh. Kaibyshev, F. Liaci, A.A. Toropov, S.V. Ivanov, A. Murayama: Journal of Crystal Growth 378, 393-396 (2013).
  3. “Surface/interface-related optical properties in Si nanodisks fabricated by neutral-beam etching using bio-templates”, T. Kiba, K. Suzaki, H. Li, M. Igarashi, S. Samukawa, A. Murayama: Journal of Crystal Growth 378, 493-496 (2013).
  4. “Quantum size effects in GaAs nanodisks fabricated using a combination of the bio-template technique and neutral beam etching”, Y. Tamura, T. Kaizu, T. Kiba, M. Igarashi, R. Tsukamoto, A. Higo, W. Hu, C. Thomas, M.E. Fauzi, T. Hoshii, I. Yamashita, Y. Okada, A. Murayama, S. Samukawa: Nanotechnology 24, 285301:1-6 (2013).
  5. “Temperature dependence of time-resolved photoluminescence in closely packed alignment of Si nanodisks with SiC barriers”, T. Kiba, Y. Mizushima, M. Igarashi, C.H. Huang, S. Samukawa, A. Murayama: Nanoscale Research Letters 8, 223:1-7 (2013).
  6. “Temperature dependence of the dynamics of optical spin injection in self-assembled InGaAs quantum dots”, T. Kiba, X.J. Yang, T. Yamamura, Y. Kuno, A. Subagyo, K. Sueoka, A. Murayama: Applied Physics Letters 103, 082405:1-5 (2013).
  7. “Structure and intermolecular dynamics of carbon disulfide/alcohols binary solution”, T. Kiba, T. Hirota, A. Murayama, S.I. Sato: Molecular Crystals and Liquid Crystals 579, 103-109 (2013).
  8. “Photophysical properties of self-assembled cyanine-dye dimmer formation assisted by cyclodextrin inclusion complexation”, S. Abe, T. Hirota, T. Kiba, N. Miyakawa, F. Wataria, A. Murayama, S.I. Sato: Molecular Crystals and Liquid Crystals 579, 22-29 (2013).
  9. “Control of magnetic field for sustainment of ion production and uniform ion flux to substrate in neutral loop discharge plasma”, T. Yoshida, Y. Sakurai, H. Sugawara and A. Murayama: Electrical Engineering in Japan, 185, 9-16 (2013).
  10. “Characteristics of electron conduction in a gas under a quadrupole magnetic field and radio-frequency electric fields”, H. Sugawara: Japanese Journal of Applied Physics 52 056101: 1-5 (2013).
  11. “Scattering-based stochastic process attracting electrons inward under antiparallel gradient magnetic fields”, H. Sugawara: Journal of Physical Society Japan 82 064501: 1-6 (2013).

International conference

  1. “Dynamics of exciton-spin relaxation in GaAs nanodisks fabricated by fully-top-down and damage-free lithography”, T. Kiba, K. Suzaki, Y. Tamura, M. Igarashi, C. Thomas, W. Hu, T. Kaizu, Y. Okada, S. Samukawa, A. Murayama: 18th International Conference on Dynamical Processes in Excited States of Solids (Oral presentation), August 9 (2013), Fuzhou Lakeside Hotel, Fuzhou, China.
  2. “Optical spin-injection dynamics at excited states in In0.5Ga0.5As quantum dots coupled with an In0.1Ga0.9As quantum well”, X.J. Yang, T. Kiba, Y. Kuno, T. Yamamura, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama: 18th International Conference on Dynamical Processes in Excited States of Solids, August 6 (2013), Fuzhou Lakeside Hotel, Fuzhou, China.
  3. “Electroluminescence from excited states in InGaAs self-assembled quantum dots”, Y. Sasaki, X.j. Yang, J. Takayama, T. Kiba, A. Subagyo, A. Ikeuchi, K. Sueoka, A. Murayama: 18th International Conference on Dynamical Processes in Excited States of Solids, August 6 (2013), Fuzhou Lakeside Hotel, Fuzhou, China.
  4. “Observation of optical gain in GaAs quantum disks fabricated by neutral-beam etching using bio-nano templates”, K. Suzaki, T. Kiba, K. Kyhm, Y. Tamura, A. Higo, S. Samukawa, A. Murayama: 18th International Conference on Dynamical Processes in Excited States of Solids, August 6 (2013), Fuzhou Lakeside Hotel, Fuzhou, China.
  5. “Transient Kerr effects in GaAs quantum disks fabricated by neutral-beam etching using bio-nano templates”, T. Tanaka, T. Sasaki, T. Kiba, K. Kyhm, Y. Tamura, A. Higo, S. Samukawa, A. Murayama: 18th International Conference on Dynamical Processes in Excited States of Solids, August 6 (2013), Fuzhou Lakeside Hotel, Fuzhou, China.
  6. “Dynamics of optical spin injection in InGaAs self-assembled quantum dots with various growth conditions”, T. Yamamura, X.J. Yang, T. Kiba, Y. Kuno, J. Takayama, A. Subagyo, K. Sueoka, A. Murayama: 18th International Conference on Dynamical Processes in Excited States of Solids, August 6 (2013), Fuzhou Lakeside Hotel, Fuzhou, China.
  7. “Photoluminescence of high-density and sub-20-nm GaAs nanodisks fabricated with a neutral Beam etching process and MOVPE regrowth for high performance QDs devices”, Y. Tamura, A. Higo, T. Kiba, W. Yunpeng, M. Igarashi, C. Thomas, W. Hu, M.E. Fauzi, A. Murayama, M. Sugiyama, Y. Nakano, S. Samukawa: 13th IEEE International Conference on Nanotechnology, August 8 (2014), Shangrila Hotel, Beijing, China.
  8. “Electron-spin dynamics in GaAs quantum wells coupled with II-VI diluted magnetic semiconductors”，A. Murayama: NSF Workshop on US-Japan Frontiers in Novel Photonic-Magnetic Devices (Oral presentation), September 21 (2013), Kasugano-so, Nara, Japan.
  9. “Dynamics of photo-excited carriers and the spin states in III-V semiconductor nanostructures; application to quantum-dot lasing”, A. Murayama: 3rd Annual World Congress of Nano Science and Technology (Invited talk), September 28 (2013), Xi’an International Conference Center, Xi’an, China.
  10. “High density and high aspect ratio GaAs/AlGaAs nanopillar array fabricated by fusion of bio-template and neutral beam etching”, Y. Tamura, A. Higo, T. Kiba, W. Yunpeng, C. Thomas, T. Okada, W. Hu, A. Murayama, M. Sugiyama, Y. Nakano, S. Samukawa: 2013 Internatinal Conference on Solid State Devices and Materials, September 25 (2013), Hilton Fukuoka Sea Hawk, Japan.
  11. “The fabrication of GaAs quantum nanodisks combination of bio-template, neutral beam etching and MOVPE regrowth””, A. Higo, Y.e Tamura, T. Kiba, C. Thomas, W. Yunpeng, M. Sugiyama, Y. Nakano, A. Murayama, S. Samukawa: IEEE Nanotechnology Materials and Device Conference MP-4-10 (Oral presentation), October 7 (2013), Shangri-La Hotel, Tainan, Taiwan.
  12. “Dynamics pf photo-excited carriers in III-V semiconductor nanostructures”, A. Murayama: Seoul National University and Hokkaido University 2013 International Workshop on New Frontiers in Convergence Science and Technology (Oral presentation), December 13 (2013), Seoul National University, Suwon, Korea.
  13. “Optically probed electron-spin relaxation in GaAs nanostructures”, T. Tanaka, T. Kiba, A. Murayama: Seoul National University and Hokkaido University 2013 International Workshop on New Frontiers in Convergence Science and Technology, December 13 (2013), Seoul National University, Suwon, Korea.
  14. “Monte Carlo simulation of electron motion in confronting divergent magnetic fields”, H. Sugawara and Y. Minami:
    XXXI International Conference on Phenomena in Ionized Gases, PS3-010, July 14-19, 2013, Granada, Spain.

2012

Publication

  1. “Control of optical bandgap energy and optical absorption coefficient by geometric parameters in sub-10 nm silicon-nanodisc array structure”,　M.F. Budiman, W. Hu, M. Igarashi, R. Tsukamoto, T. Isoda, K.M. Itoh, I. Yamashita, A. Murayama, Y. Okada, S. Samukawa:　Nanotechnology 23, 065302:1-6 (2012).
  2. “Picosecond transient photoluminescence in high-density Si-nanodisk arrays fabricated using bio-nano-templates”, T. Kiba, Y. Mizushima, M. Igarashi, C.H. Huang, S. Samukawa, A. Murayama: Applied Physics Letters 100, 053117:1-4 (2012), and also selected in the March 2012 issue of Virtual Journal of Ultrafast Science by American Physical Society.
  3. “Antiferromagnetic interaction in coupled CdSe/ZnMnSe quantum dot structures”, D. Dagnelund, Q.J. Ren, I.A. Buyanova, A. Murayama, W.M. Chen: Applied Physics Letters 101, 052405:1-5 (2012).
  4. “Sub-picosecond spin relaxation of bright excitons and imbalance suppression in asymmetric CdSe/ZnS nanocrystal quantum dots under an applied magnetic field”, K. Kyhm, J. Kim, H.-S. Yang, K.-C. Je, A. Murayama: Journal of Nanoscience and Nanotechnology 12, 2919–2923 (2012).
  5. “Plasmonic enhancements of photoluminescence in hybrid Si nanostructures with Au fabricated by fully top-down lithography”, K. Nakaji, H. Li, T. Kiba, M. Igarashi, S. Samukawa, A. Murayama: Nanoscale Research Letters 7, 629:1-5 (2012).
  6. “Picosecond carrier dynamics induced by coupling of wavefunctions in a Si-nanodisk array fabricated by neutral beam etching using bio-nano-templates”, T. Kiba, Y. Mizushima, M. Igarashi, S. Samukawa, A. Murayama: Nanoscale Research Letters 7, 587:1-5 (2012).
  7. “Spectral narrowing of UV-visible absorption and emission spectra of anthracene-derivatives in β-cyclodextrin nanocavity: effects of host/guest stoichiometry”, S.I. Sato, Y. Yoshizumi, T. Kiba, A. Murayama, S. Abe: Molecular Crystals and Liquid Crystals 568, 60-65 (2012).

International conference

  1. “Picosecond carrier dynamics induced by coupling of wavefunctions in a Si-nanodisk array fabricated by neutral beam etching using bio-nano-templates”, T. Kiba, Y. Mizushima, M. Igarashi, S. Samukawa, A. Murayama: International Conference on Superlattices, Nanostructures, and Nanodevices, ThP1-13, July 26 (2012), Dresden, Germany.
  2. “Plasmonic enhancement of photoluminescence in hybrid Si nanostructures with Au fabricated by fully top-down lithography”, K. Nakaji, H. Lee, T. Kiba, M. Igarashi, S. Samukawa, A. Murayama: International Conference on Superlattices, Nanostructures, and Nanodevices, TuP2-9, July 24 (2012), Dresden, Germany.
  3. “High-density and sub-20-nm GaAs nanodisk array fabricated using neutral beam etching process for high performance QDs devices”, Y. Tamura, M. Igarashi, M.E. Fauzi, R. Tsukamoto, T. Kaizu, T. Kiba, I. Yamashita, Y. Okada, A. Murayama, S. Samukawa: 12th International Conference on Nanotechnology, August 22 (2012), International Convention Centre, Birmingham, UK.
  4. “Dynamics of electron-spin injection in a heterovalent GaAs/AlGaAs/ZnMnSe structure with a coupled double quantum well of GaAs/AlGaAs”, Y. Kuno, T. Sasaki, T. Kiba, V.Kh. Kaibyshev, F. Liaci, A.A. Toropov, S.V. Ivanov, Akihiro Murayama, 17th International Conference on Molecular Beam Epitaxy, September 25 (1012), Nara New Public Hall, Nara, Japan.
  5. “Surface/interface-related optical properties in Si nanodisks fabricated by neutral-beam etching using bio-templates”, T. Kiba, K. Suzaki, H. Li, M. Igarashi, S. Samukawa, A. Murayama: 17th International Conference on Molecular Beam Epitaxy, September 27 (1012), Nara New Public Hall, Nara, Japan.
  6. “Stochastic scattering process to induce inward electron flow in electron conduction path between antiparallel gradient magnetic fields”, H. Sugawara: XXI Europhysics Conference on Atomic and Molecular Physics of Ionized Gases, P1.2.5, July 10-14, 2012, Viana do Castelo, Portugal.

2011

Publication

  1. “Optical absorption characteristic of highly ordered and dense two-dimensional array of silicon nanodiscs”, C.H. Huang, X.Y. Wang, M. Igarashi, A. Murayama, Y. Okada, I. Yamashita, S. Samukawa: Nanotechnology 22, 105301:1-8 (2011).
  2. “Remote plasma chemical vapor deposition of carbon nanotubes and analysis of plasma effect”, Y. Fukuda, J. Takayama, N. Asaoka, Y. Suda, H. Sugawara, A. Murayama: IEEE Transactions on Plasma Science 39, 3133-3139 (2011).
  3. “Control of magnetic field in neutral loop discharge plasma for uniform distribution of ion flux on substrate”, Y. Sakurai, T. Osaga and H. Sugawara: IEEE Transactions on Plasma Science 39, Pt. 1, 2550-2551 (2011).
  4. “Electron distribution in a quadrupole magnetic field to drive magnetic neutral loop discharge plasma”, T. Osaga, Y. Sakurai and H. Sugawara: IEEE Transactions on Plasma Science 39, Pt. 1, 2546-2547 (2011).
  5. “Rectification effect of gradient antiparallel magnetic fields on electron conduction in a gas under a radio-frequency electric field”, H. Sugawara, T. Osaga and H. Yamamoto: Plasma Sources Science and Technology 20 055002: 1-7 (2011).
  6. “Structure and dynamics of a magnetic neutral loop discharge plasma described using electron motion in a quadrupole magnetic field”, T. Osaga, H. Sugawara and Y. Sakurai: Plasma Sources Science and Technology 20 065003: 1-7 (2011).

International conference

  1. “Damage-free top-down processes of fabricating two-dimensional array of sub-10nm nanometer GaAs nanodisks using bio-template and neutral beam etching for intermediate band solar cell applications”, X.Y. Wang, C.H. Huang, R. Tsukamoto, T. Kaizu, M. Igarashi, P.A. Mortemousque, H. Shinohara, Y. Okada, A. Murayama, K. Itoh, Y. Ohno, I. Yamashita, S. Samukawa: 37th IEEE Photovoltaic Specialists Conference, June 23 (2013), Seattle, USA.
  2. “Optical absorption, photoluminescence and miniband formation of a highly ordered and dense 2-dimensional array of Si nanodisks for quantum dot solar cells”, M. Igarashi, C.H. Huang, X.Y. Wang, M.F. Budiman, Y. Tamura, T. Kiba, A. Murayama, T. Kaizu, Y. Okada, S. Samukawa: 37th IEEE Photovoltaic Specialists Conference, June 24 (2011), Seattle, USA.
  3. “High-density optical spin injection in self-assembled semiconductor quantum dots”, A. Murayama, N. Tamura, T. Yamazaki, T. Kiba: 16th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter (Oral presentation), June 30 (2011), Ann Arber, USA.
  4. “Inter-disk electron transfer in Si-nanodisk arrays fabricated by using bio-templates”, T. Kiba, Y. Mizushima, A. Murayama, M. Igarashi, C.-H. Huang, S. Samukawa: 16th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, June 28 (2011), Ann Arber, USA.
  5. “Fabrication of Two-dimensional Array of Sub-10nm GaAs Nanodisk using Bio-template Neutral Beam Etching Process”, S.H. Lin, M. Igarashi, X.Y. Wang, C.H. Huang, Y. Ohno, A. Murayama, S. Samukawa: American Vacuum Society 58th International Symposium, October 31 (2011), Nashville, Tennessee, USA.
  6. “Electron conduction under the rectification effect of antiparallel magnetic fields”, H. Sugawara: XVI International Workshop on Low Energy Positron and Positronium Physics / XVII International Symposium on Electron-Molecule Collisions and Swarms (Invited talk), July 22-25, 2011, Maynooth, Ireland.
  7. “Monte Carlo simulation of electron transport under quadrupole magnetic field and radio-frequency electric field”, H. Sugawara: 30th International Conference on Phenomena in Ionized Gases, A2-3, August 28-September 2, 2011, Belfast, Northern Ireland, UK.

2010

Publication

  1. “Spin dynamics in ZnO-based materials”, I.A. Buyanova, A. Murayama, T. Furuta, Y. Oka, D.P. Norton, S.J. Pearton, A. Osinsky, J.W. Dong, C.W. Tu, W.M. Chen: Journal of Superconductivity and Novel Magnetism 23, 161-165 (2010).
  2. “Defect-free etching process for GaAs/AlGaAs hetero-nanostructure using chlorine/argon mixed neutral beam”, X.Y. Wang, C.H. Huang, Y. Ohno, M. Igarashi, A. Murayama, S. Samukawa: Journal of Vacuum of Science and Technology B 28, 1138 (2010).
  3. “New origins of stimulated emission and temperature dependence in ZnO”, B. Kim, D. Kim, C. Cho, N. Tamura, T. Yamazaki, A. Murayama, K. Kyhm: Physics of Semiconductors: 30th International Conference on the Physics of Semiconductors (AIP Conference Proceedings) 1399, 25-26 (2010).
  4. “Numerical simulation of electron transport in electric and magnetic fields for analysis of electron temperature and number density profiles measured in an argon magnetic neutral loop discharge plasma”, H. Sugawara, T. Osaga, H. Tsuboi, K. Kuwahara and S. Ogata: Japanese Journal of Applied Physics 49 086001: 1-5 (2010).

International conference

  1. “Concept of dynamic control of magnetic field for high-throughput and wide-area etching by neutral loop discharge plasma”, H. Sugawara: 63rd Ann. Gaseous Electronics Conference on (American Physical Society) / 7th International Conference on Reactive Plasmas (Japan Society of Applied Physics) / 28th Symposium on Plasma Processing (Japan Society of Applied Physics), DTP.00027, October 4-8, 2010, Paris, France.

2009

 Publication

  1. “Propagation dynamics of exciton spins in a high-density semiconductor quantum dot system”, A. Murayama, T. Furuta, S. Oshino, K. Hyomi, M. Sakuma, I. Souma, D. Dagnelund, I.A. Buyanova, W.M. Chen: Physica Status Solidi (c) 6, 50-52 (2009).
  2. “Cooling and spin-relaxation dynamics of spin-polarized excitons in a diluted magnetic semiconductor quantum well”, A. Murayama, K. Saito, I. Souma: Physica Status Solidi (c) 6, 315-318 (2009).
  3. “Micro-photoluminescence study of electron-spin injection in self-assembled semiconductor quantum dots”, K. Hyomi, M. Sakuma, A. Murayama: Journal of Luminescence 129, 1715–1717 (2009).
  4. “Transfer dynamics of spin-polarized excitons into semiconductor quantum dots”, A. Murayama, T. Furuta, S. Oshino, K. Hyomi, M. Sakuma, I. Souma, D. Dagnelund, I.A. Buyanova, W.M. Chen: Journal of Luminescence 129, 1927–1930 (2009).
  5. “Spin Dynamics in III-V/II-VI:Mn Heterovalent Quantum Wells”, A.A. Toropov, Ya.V. Terent’ev, A.V. Lebedev, P.S. Kop’ev, S.V. Ivanov, T. Koyama, K. Nishibayashi, A. Murayama, Y. Oka: International Journal of Modern Physics B 23, 2739-2749 (2009).
  6. “Magnetic field induced charging effect in a single CdSe quantum dot”, Q.J. Ren, L.H. Bai, A. Murayama, Z.H. Chen, X.C. Shen: Physica Status Solidi (b) 246, 791-794 (2009).
  7. “Is the diameter or chirality distribution of single-walled carbon nanotubes selected in the synthesis process?”, K. Bhattacharyya, Y. Suda, A. Okita, T. Saito, A. Ozeki, M. Maekawa, J. Takayama, H. Sugawara and Y. Sakai: Journal of Nanoscience and Nanotechnology 9, 1897-1903 (2009).
  8. “Carbon nanotube growth in alcohol vapor plasma”, Y. Suda, A. Okita, J. Takayama, A. Oda, H. Sugawara, Y. Sakai, S. Oke and H. Takikawa: IEEE Transactions on Plasma Science 37, 1150-1155 (2009).

International conference

  1. “Carrier and spin injection from ZnMnSe to CdSe quantum dots”, D.Dagnelund, I.A. Buyanova, T. Furuta, K. Hyomi, I. Suoma, A. Murayama, W.M. Chen: 3rd. International Conference on Quantum, Nano and Micro Technologies, February 1-7, 2009, Cancun, Mexico.
  2. “Magnetic semiconductor nanostructures; toward spin manipulation in semiconductor quantum structures”, A. Murayama: International Workshop on Photons and Spins in Nanostructures (Invited talk), July 27 (2009), Sapporo, Japan.
  3. “Plasma power dependence of properties of amorphous fluorocarbon films composed by PECVD using perfluorooctane”, K. Mizuno, H. Sugawara, Y. Sakai, A. Murayama: 29th International Conference on Phenomena in Ionized Gases, PA13-9, July 13-17, 2009, Cancun, Mexico.
  4. “DC plasma-assisted thermal chemical vapor deposition of single-walled carbon nanotubes”, Y. Fukuda, J. Takayama, N. Asaoka, Y. Suda, H. Sugawara and A. Murayama: 22nd International Microprocesses and Nanotechnology Conference, 19D-10-44, November 16-19, 2009, Sheraton Sapporo Hotel, Sapporo, Japan.

2008

Publication

  1. “Spin injection in a coupled system of a diluted magnetic semiconductor Zn0.80Mn0.20Se and self-assembled quantum dots of CdSe”, D. Dagnelund, I.A. Buyanova, W.M. Chen, A. Murayama, T. Furuta, K. Hyomi, I. Souma, Y. Oka: Superlattices and Microstructures 43, 615-619 (2008).
  2. “Magneto-optical and tunable laser excitation spectroscopy of spin-injection and spin loss from Zn(Cd)MnSe diluted magnetic quantum well to CdSe non-magnetic quantum dots”, D. Dagnelund, I.A. Buyanova, W.M. Chen, A. Murayama, T. Furuta, K. Hyomi, I. Souma, Y. Oka: Materials Science and Engineering B 147, 262-266 (2008).
  3. “Efficiency of optical spin injection and spin loss from a diluted magnetic semiconductor ZnMnSe to CdSe nonmagnetic quantum dots”, D. Dagnelund, I.A. Buyanova, W.M. Chen, A. Murayama, T. Furuta, K. Hyomi, I. Souma, Y. Oka: Physical Review B 77, 035437:1-5 (2008), and also selected in the Feb. 11, 2008 issue of Virtual Journal of Nanoscale Science & Technology by American Physical Society.
  4. “Dominant factors limiting efficiency of spin detection in ZnO-based materials”, W.M. Chen, I.A. Buyanova, A. Murayama, Y. Oka, D.P. Norton, S.J. Pearton, A. Osinsky, J.W. Dong: Applied Physics Letters 92, 092103:1-3 (2008), and also selected in the March 17, 2008 issue of Virtual Journal of Nanoscale Science & Technology by American Physical Society.
  5. “Spin-conserving tunneling of excitons in diluted magnetic semiconductor double quantum wells”, J. Park, A. Murayama, I. Souma, Y. Oka, D. Dagnelund, I.A. Buyanova, W.M. Chen: Japanese Journal of Applied Physics 47, 3533-3536 (2008).
  6. “Exciton broadening and spin dynamics in III-V/II-VI:Mn heterovalent double quantum wells”, A. A. Toropov, Ya. V. Terent’ev, P. S. Kop’ev, S. V. Ivanov, T. Koyama, K. Nishibayashi, A. Murayama, Y. Oka, A. Golnik, J. A. Gaj: Physical Review B 77, 235310:1-8 (2008).
  7. “Dual distributions for the metallic and semiconducting single-walled carbon nanotubes observed by Raman spectroscopy”, K. Bhattacharyya, Y. Suda, A. Okita, T. Saito, A. Ozeki, M. Maekawa, J. Takayama, H. Sugawara, Y. Sakai: Carbon – Science and Technology 1, 4-8 (2008).
  8. “Electron transport in carbon tetrafluoride along a magnetically neutral plane between constant gradient antiparallel magnetic fields”, H. Sugawara and Y. Sakai: Journal of Physics D: Applied Physics 41, 135208: 1-7 (2008).
  9. “Evaluation of ion and radical fluxes in CH4/H2 plasma for CNT growth”, Y. Hizume, A. Okita, A. Oda, H. Sugawara, Y. Suda and Y. Sakai: Transactions of IEE Japan 128-A, 624-628 (2008).

International Conference

  1. “Magneto-optical properties and spin dynamics in novel II-VI and III-V semiconductor materials and nanostructures”, I.A. Buyanova, W.M. Chen, A. Murayama, Y. Oka, C.R. Abernathy, S.J. Pearton: The Progress in Electromagnetics Research Symposium (Invited talk), March 24-28 (2008), Hangzhou, China.
  2. “Spin injection and spin detection in semiconductor quantum structures”, W.M. Chen, I.A. Buyanova, A. Murayama, Y. Oka, S.J. Pearton, D. P. Norton, C.R. Abernathy, A. Osinsky, J. W. Dong: The First Nordic Workshop on Spintronics and Nanomagnetism (Invited talk), April 22-24 (2008), Gimo, Sweden.
  3. “Propagation dynamics of exciton spins in a high-density semiconductor quantum dot system”, A. Murayama, T. Furuta, S. Oshino, K. Hyomi, M. Sakuma, I. Souma, D. Dagnelund, I.A. Buyanova, W.M. Chen: 8th International Conference on Excitonic Processes in Condensed Matter (Oral presentation), June 22-27 (2008), Kyoto University, Kyoto, JAPAN.
  4. “Cooling and spin-relaxation dynamics of spin-polarized excitons in a diluted magnetic semiconductor quantum well”, A. Murayama, K. Saito, I. Souma: 8th International Conference on Excitonic Processes in Condensed Matter, June 22-27 (2008), Kyoto University, Kyoto, JAPAN.
  5. “Magneto-optical spectroscopy of spin injection from ZnMnSe to CdSe quantum dots”, D. Dagnelund, I. A Buyanova , W.M. Chen, T. Furuta, K. Hyomi, I. Souma, A. Murayama: The International Scanning Probe Microscopy Conference, June 22-24 (2008), Seattle, USA.
  6. “Transfer dynamics of spin-polarized excitons into semiconductor quantum dots”, A. Murayama, T. Furuta, S. Oshino, K. Hyomi, M. Sakuma, I. Souma, D. Dagnelund, I.A. Buyanova, W.M. Chen: 15th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter (Oral presentation), July 7-11 (2008), University of Lyon, Lyon, France.
  7. “Transient magneto-photoluminescence in self-assembled quantum dots of a diluted magnetic semiconductor”, S. Oshino, T. Furuta, I. Souma, A. Murayama, D. Dagnelund, I.A. Buyanova, W.M. Chen: 15th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, July 7-11 (2008), University of Lyon, Lyon, France.
  8. “Micro-photoluminescence study of electron-spin injection in self-assembled semiconductor quantum dots”, K. Hyomi, M. Sakuma, A. Murayama: 15th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, July 7-11 (2008), University of Lyon, Lyon, France.
  9. “Spin dynamics in ZnO-based materials”, W.M. Chen, I.A. Buyanova, T. Furuta, A. Murayama, D. P. Norton, S.J. Pearton, A. Osinsky, J. W. Dong: 5th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors, August 3-6 (2008), Foz do Iguaçu, PR, Brazil.
  10. “Electron drift along magnetically neutral channels between gradient magnetic fields”, H. Sugawara and Y. Sakai: 15th Gaseous Electronics Meeting, 7-1 (Invited talk), February 3-6, 2008, Murramarang Resort, Australia.
  11. “Selective growth of carbon nanotubes by chemical vapor deposition using CH4/CO2 mixture gas”, J. Takayama, Y. Suda, A. Okita, J. Nakamura, H. Sugawara and Y. Sakai: International Carbon Nanotube Conference in Nagoya University, GP-5, February 14-15, 2008, Nagoya University, Nagoya, Japan.
  12. “Investigation of carbon nanotube precursors in CH4/H2 plasma,”, A. Okita, Y. Suda, J. Takayama, A. Oda, J. Nakamura, H. Sugawara and Y. Sakai: International Carbon Nanotube Conference in Nagoya University, GP-6, February 14-15, 2008, Nagoya University, Nagoya, Japan.
  13. “Formation of winding surface of amorphous fluorocarbon films composed by perfluorooctane plama-enhanced chemical vapor deposition”, K. Mizuno, H. Sugawara, T. Yamauchi, H. Koike, Y. Suda and Y. Sakai: XIX Europhysic Conference on Atom-Molecular Phenomena in Ionized Gases, 1-61, July 15-19, 2008, Granada, Spain.
  14. “A reverse-blocking effect of antiparallel magnetic fields on electron transport in gas”, H. Sugawara: 61st Annual Gaseous Electronics Conference (American Physical Society), FTP1.00004, October 13-17, 2008, Dallas, Texas, USA.
  15. “Deposition of layered amorphous fluorocarbon films by C8F18 PECVD”, T. Yamauchi, K. Mizuno and H. Sugawara: 61st Annual Gaseous Electronics Conference on (American Physical Society), FTP1.00019, October 13-17, 2008, Dallas, Texas, USA.
  16. “Thermal effect on multi-layered amorphous fluorocarbon films composed by plasma-enhanced chemical vapor deposition using perfluorooctane”, K. Mizuno, H. Sugawara, T. Yamauchi and Y. Sakai: 14th Asian Conference on Electrical Discharge, A-3, November 23-25, 2008, Bumi Sangkuriang, Bandung, West Jawa, Indonesia.
  17. “Evaluation of the effect of CxHy accumulation on the production of ions and radicals in CH4/H2 plasma”, Y. Hizume, A. Oda and H. Sugawara: 14th Asian Conference on Electrical Discharge, A-5, November 23-25, 2008, Bumi Sangkuriang, Bandung, West Jawa, Indonesia.