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J-GLOBAL ID：200901003313782430   Update date: Jan. 30, 2024

Kojima Osamu

コジマ オサム | Kojima Osamu
Affiliation and department：
Chiba Institute of Technology

About Chiba Institute of Technology


Job title： Professor
Research field  (2)： Electric/electronic material engineering ,  Semiconductors, optical and atomic physics
Research keywords  (2)： Ultrafast spectroscopy ,  Semiconductor optics
Research theme for competitive and other funds  (15)：
  • 2022 - 2025 Realization of integrated high sensitivity electric field sensor using quantum dot superlattice
  • 2021 - 2024 表面電場制御法に基づく超高速光励起過渡現象の解明と制御
  • 2019 - 2023 Photoconductive devices based on quantum dot superlattice for THz generation and detection
  • 2017 - 2020 周波数可変テラヘルツ電磁波光源の実現に向けた励起子物性の制御(国際共同研究強化)
  • 2014 - 2017 量子ビートチューニングによる差周波混合テラヘルツ電磁波の増強
Show all
Papers (98)：
  • Osamu Kojima, Ikuo Tamachii, Takashi Kita. Characteristics of ultrafast response induced by impulsive interference of excitons in a GaAs/AlAs multiple quantum well on a slightly strained buffer layer. Applied Physics Express. 2023. 16. 6. 062009-062009
  • Osamu Kojima, Shinnosuke Osaki, Takashi Kita, Kouichi Akahane. Generation of nonlinear polarization to emit terahertz waves in above gap states in GaSb/AlGaSb multiple quantum wells. Applied Physics Express. 2023. 16. 051002-1-051002-4
  • Takayuki Hasegawa, Osamu Kojima. Control of electric field screening effects induced by photogenerated carriers for studies on ultrafast transient phenomena. 2023. 32. 52-57
  • Osamu Kojima, Yuki Tarui, Takashi Kita, Avan Majeed, Pavlo Ivanov, Edmund Clarke, Richard A. Hogg. Increase in terahertz-wave intensity in a magnetic field due to difference-frequency mixing by exciton excitation in a GaAs/AlAs multiple quantum well. Optics Express. 2022. 30. 7. 11789-11789
  • Osamu Kojima, Takashi Kita, Matthew J Steer, Richard A Hogg. Modulation of exciton states through resonant excitation by continuous wave lasers in a GaAs/AlAs multiple quantum well. Journal of Physics D: Applied Physics. 2021. 54. 33. 335106-335106
ｍore...
MISC (52)：
  • Kojima O., Okumura S., Kita T., Akahane K. 8aAJ-6 Upconversion photoluminescence in GaAs/AlAs multiple quantum wells. Meeting abstracts of the Physical Society of Japan. 2014. 69. 2. 514-514
  • Kojima O, Kita T., Akahane K. 27aAU-9 Control of exciton quantum beat in a multiple quantum well at higher temperature. Meeting abstracts of the Physical Society of Japan. 2014. 69. 1. 689-689
  • Kojima O., Kojima K., Kita T., Akahane K. Effects of phonons on ultrafast response due to quantum beat oscillation. Meeting abstracts of the Physical Society of Japan. 2013. 68. 2. 600-600
  • Kojima O., Hayashii K., Kita T., Akahane K. 26aXQ-4 Intensity modulation of optical pulse due to exciton quantum beat in a GaAs/AlAs multiple quantum well. Meeting abstracts of the Physical Society of Japan. 2013. 68. 1. 742-742
  • Tasaki J., Kojima O., Kita T., Akahane K. 24pPSA-24 Carrier dynamics in strain compensation multiple stacked quantum dots under non-resenant excitatien rendition. Meeting abstracts of the Physical Society of Japan. 2012. 67. 1. 778-778
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Patents (1)：
  • テラヘルツ電磁波発生源、テラヘルツ電磁波発生装置
Books (2)：
  • Quantum Dot Switches:Towards Nanoscale Power-Efficient All-Optical Signal Processing
    Quantum Dot Devices:Lecture Notes in Nanoscale Science and Technology 2012
  • Dynamics of Excitons Confined in Semiconductor Thin Films (in High-Power and Femtosecond Lasers : Properties, Materials and Applications (Lasers and Electro-optics Research and Technology))
    Nova Science Pub Inc 2009
Lectures and oral presentations  (319)：
  • Emission of terahertz wave using optical nonlinearity of strained semiconductor
    (International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS 2023)
  • Ultrafast response of excitons in multiple quantum wells induced by fabrication on strained buffer layer
    (The 12th Advanced Lasers and Photon Sources Conference 2023)
  • Observation of exciton quantum beats in a stacked GaAs/AlAs multiple quantum well
    (2023)
  • ダブルパルス-ポンプ-プローブ法によるGaAs/AlAs多重量子井戸における超高速応答の評価
    (第83回応用物理学会秋季学術講演会 2022)
  • Well width dependence of difference-frequency-mixing process by barrier layer excitation in GaSb/AlGaSb multiple quantum wells
    (2022)
ｍore...
Education (2)：
  • 2002 - 2005 Osaka City University Graduate School, Division of Engineering
  • - 2005 大阪市立大学 大学院工学研究科博士課程電子情報系専攻修了
Professional career (1)：
  • 博士(工学) (大阪市立大学)
Committee career (1)：
  • 2010/04 - 現在 IEICEマイクロ波テラヘルツ光電子技術研究専門委員会 専門委員
Awards (2)：
  • 2008/07 - ICOOPMA組織委員会 Best Poster Award Lengthening of photoluminescence decay time owing to expansion of electron envelope functions in stacked quantum dots
  • 2008/03 - Journal of Physical Society of Japan Editors' Choice 半導体励起子の超高速応答に関する研究
Association Membership(s) (6)：
公益社団法人 応用物理学会 ,  Optica ,  The Physical Society of Japan ,  Optical Society of America ,  応用物理学会 ,  日本物理学会
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