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Real-space imaging of transient carrier dynamics by nanoscale pump–probe microscopy
http://hdl.handle.net/2241/117084
http://hdl.handle.net/2241/117084f1be4b3d-ccab-4747-bbe1-5e194417b201
名前 / ファイル | ライセンス | アクション |
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NP_4-12.pdf (1.7 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2012-06-06 | |||||
タイトル | ||||||
タイトル | Real-space imaging of transient carrier dynamics by nanoscale pump–probe microscopy | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Terada, Yasuhiko
× Terada, Yasuhiko× Yoshida, Shoji× Takeuchi, Osamu× Shigekawa, Hidemi |
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著者別名 |
寺田, 康彦
× 寺田, 康彦× 吉田, 昭二× 武内, 修× 重川, 秀実 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Smaller and faster are key concepts underlying the progress of current nanoscience and nanotechnology. The development of a method of exploring the transient carrier dynamics in organized nanostructures with pinpoint accuracy is therefore highly desirable. Here, we present a new microscopy that enables real-space measurement of the spatial variation of ultrafast dynamics. It is a pulse-laser-combined scanning tunnelling microscopy with a novel delay-time modulation method based on a pulse-picking technique. A non-equilibrium carrier distribution is generated with ultrashort laser pulses, and its relaxation processes are observed by scanning tunnelling microscopy using a pump–probe technique. We have directly analysed the recombination of excited carriers via the gap states associated with a cobalt nanoparticle/GaAs structure in real space. Through the site dependence of the decay time on the tunnelling current injection from the scanning tunnelling microscopy tip, the hole capture rate at the gap states has been imaged on the nanoscale for the first time. | |||||
書誌情報 |
Nature photonics 巻 4, 号 12, p. 869-874, 発行日 2010-12 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1749-4885 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1038/nphoton.2010.235 | |||||
権利 | ||||||
権利情報 | © 2010 Macmillan Publishers Limited | |||||
著者版フラグ | ||||||
値 | author | |||||
出版者 | ||||||
出版者 | Nature Publishing | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/117084 | |||||
識別子タイプ | HDL |