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Ultrafast optical modulation of Dirac electrons in gated single-layer graphene
http://hdl.handle.net/10131/00013340
http://hdl.handle.net/10131/000133408ecac052-2f18-4644-9dea-2658e15141a5
名前 / ファイル | ライセンス | アクション |
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PhysRevB.101.245408.pdf (1.3 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-07-08 | |||||
タイトル | ||||||
タイトル | Ultrafast optical modulation of Dirac electrons in gated single-layer graphene | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | Carrier dynamicsCarrier, generation & recombination, Optical conductivity, Ultrafast optics | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Ikufumi, Katayama
× Ikufumi, Katayama× Kei-ichi, Inoue× Yusuke, Arashida× Yang, Wu× Hyunsoo, Yang× Taiki, Inoue× Shohei, Chiashi× Shigeo, Maruyama× Tadaaki, Nagao× Masahiro, Kitajima× Jun, Takeda |
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著者所属 | ||||||
Department of Physics, Graduate School of Engineering Science, Yokohama National University | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Engineering Science, Yokohama National University | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Engineering Science, Yokohama National University | ||||||
著者所属 | ||||||
Department of Electrical and Computer Engineering, National University of Singapore | ||||||
著者所属 | ||||||
Department of Electrical and Computer Engineering, National University of Singapore | ||||||
著者所属 | ||||||
Department of Mechanical Engineering, The University of Tokyo | ||||||
著者所属 | ||||||
Department of Mechanical Engineering, The University of Tokyo | ||||||
著者所属 | ||||||
Department of Mechanical Engineering, The University of Tokyo and Energy Nano Engineering Laboratory, National Institute of Advanced Industrial Science and Technology | ||||||
著者所属 | ||||||
International Center for Materials Nanoarchitectonics (MANA), National Institute of Materials Science and Department of Condensed Matter Physics, Hokkaido University | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Engineering Science, Yokohama National University and International Center for Materials Nanoarchitectonics (MANA), National Institute of Materials Science | ||||||
著者所属 | ||||||
Department of Physics, Graduate School of Engineering Science, Yokohama National University | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Fermi level dependence of ultrafast optical responses of single-layer graphene has been investigated using sub-10-fs pump-probe spectroscopy under bias voltages. We observe the ultrafast thermalization of photoexcited carriers, whose dynamics can be modulated via bias-induced change of the Fermi level. The relaxation time and the amplitude of the electronic response are maximized when the Fermi level reaches approximately half of the excitation photon energy. From the analysis of the pump-pulse-induced optical conductivity change, we find that the bias-induced blocking of the relaxation pathways and the pump-induced change of the electronic temperature and the Fermi level significantly contribute to the observed ultrafast optical modulation. The results demonstrate the controllability of the ultrafast optical responses in single-layer graphene, which could be useful for future ultrafast electro-optic graphene devices. | |||||
書誌情報 |
PHYSICAL REVIEW B 巻 101, 号 24, p. 245408-1-245408-6, 発行日 2020-06-05 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 24699950 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11187113 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1103/PhysRevB.101.245408 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | American Physical Society | |||||
関係URI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevB.101.245408 | |||||
関連名称 | https://doi.org/10.1103/PhysRevB.101.245408 |