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J-GLOBAL ID:200901003313782430
Update date: Oct. 11, 2024 Kojima Osamu
コジマ オサム | Kojima Osamu
Affiliation and department: 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
- 2011 - 励起子量子ビートを利用した超高速光スイッチの実現
- 2009 - 3次元的に結合した積層型超高密度量子ドットによる高効率太陽電池の実現
- 2009 - 不純物ナノ構造の局所光応答とスケーラブル光子デバイスの実現
- 2009 - 積層量子ドットによる動的偏波制御光アンプの実現
- 2009 - 積層超高密度量子ドットにおける励起子発光増強機構の解明
- 2007 - 量子ドットナノ構造による広帯域偏波無依存光アンプの実現
- 2007 - 超短光パルス制御による励起子非線形光学応答制御
- 2007 - 多元制御量子ドットを用いた超高速面型光スイッチの実現
- 2007 - 戦略的:光電場のナノ空間構造を利用した超高速光スイッチの開発
- 2006 - ナノ構造半導体励起子による巨大非線形応答の実現
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Papers (101): -
Toshiyuki Kaizu, Osamu Kojima, Yasuo Minami, Takahiro Kitada, Yukihiro Harada, Takashi Kita, Osamu Wada. Lateral photoconductivity of InAs/GaAs quantum dots for 1.5 μm-wavelength excitation photoconductive terahertz antenna devices. Japanese Journal of Applied Physics. 2024. 63. 8. 082002-082002
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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
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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
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Takayuki Hasegawa, Osamu Kojima. Control of electric field screening effects induced by photogenerated carriers for studies on ultrafast transient phenomena. 2023. 32. 52-57
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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
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
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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
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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
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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
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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
more... Patents (1): 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 (320): -
光励起キャリア電場遮蔽現象に基づく電場変調テラヘルツ波計測
(第71回応用物理学会春季学術講演会 2024)
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GaSb/AlGaSb多重量子井戸における差周波混合によるテラヘルツ電磁波発生
(第71回応用物理学会春季学術講演会 2024)
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GaAs/AlAs多重量子井戸におけるテラヘルツ電磁波吸収に対する自由キャリアの効果
(第84回応用物理学会秋季学術講演会 2023)
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Emission of terahertz wave using optical nonlinearity of strained semiconductor
(International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS 2023)
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Ultrafast response of excitons in multiple quantum wells induced by fabrication on strained buffer layer
(The 12th Advanced Lasers and Photon Sources Conference 2023)
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): 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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