| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-02-13 |
| タイトル |
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タイトル |
Pulse-to-pulse Ultrafast Dynamics of Highly Photoexcited Ge2Sb2Te5 Thin Films |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 著者 |
Kobayashi, Masataka
| en |
Kobayashi, Masataka
Graduate School of Engineering Science, Yokohama National University
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Search repository
Arashida, Yusuke
ORCID
0000-0001-6366-3934
e-Rad_Researcher
30715181
| en |
Arashida, Yusuke
Department of Physics, Graduate School of Engineering Science, Yokohama National University
Institute of Applied Physics, University of Tsukuba
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Search repository
Asakawa, Kanta
ORCID
0000-0001-5595-0781
e-Rad_Researcher
50817046
| en |
Asakawa, Kanta
Department of Physics, Graduate School of Engineering Science, Yokohama National University
Graduate School of Engineering, Tokyo University of Agriculture and Technology
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Search repository
Kaneshima, Keisuke
Kuwahara, Masashi
Konishi, Kuniaki
Yumoto, Junji
Kuwata-Gonokam, Makoto
Takeda, Jun
Katayama, Ikufumi
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Observing ultrafast pulse-to-pulse dynamics of highly photoexcited materials could foster a comprehensive understanding of the initial stage of irreversible photoinduced events, such as phase change, structural deformation, and laser ablation. In this study, using high-repetition-rate single-shot spectroscopy and a laser microscope, the pulse-to-pulse ultrafast dynamics of energy relaxation in Ge2Sb2Te5 thin films are revealed under high-density photoexcitation that induces sequential events involving the crystalline-to-amorphous phase transition, melt and quench processes, and formation of laser-induced periodic surface structures (LIPSSs). Above the threshold excitation density for LIPSS formation, the first excitation pulse induces the transient transmittance change of the crystalline phase in a picosecond timescale, and subsequent pulses provoke the amorphous phase energy relaxation with a long decay time of hundreds of picoseconds. We observed that the subsequent pulses gradually reduce the amplitude and decay time of the transient transmittance, leading to efficient energy relaxation and LIPSS formation in the photoinduced amorphous phase. |
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言語 |
en |
| 書誌情報 |
en : Japanese Journal of Applied Physics
巻 62,
号 2,
発行日 2023-02-10
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| ISSN |
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収録物識別子タイプ |
EISSN |
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収録物識別子 |
13474065 |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA12295836 |
| DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.35848/1347-4065/acb476 |
| 権利 |
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権利情報Resource |
https://creativecommons.org/licenses/by/4.0/ |
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権利情報 |
Creative Commons Attribution 4.0 International |
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言語 |
en |
| 著者版フラグ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 出版者 |
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出版者 |
IOP Publishing |
| 出版者 |
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出版者 |
Japan Society of Applied Physics |
Kobayashi_2023_Jpn._J._Appl._Phys._62_022001.pdf
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