Study of ultrafast dynamics in graphene by using high-order haromonic photoelectron spectroscopy
| Project/Area Number |
23310086
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanomaterials/Nanobioscience
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| Research Institution | NTT Basic Research Laboratories |
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Principal Investigator |
OGURI Katsuya 日本電信電話株式会社ＮＴＴ物性科学基礎研究所, 量子光物性研究部, 主任研究員 (10374068)
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| Co-Investigator(Kenkyū-buntansha) |
NAKANO Hidetoshi 東洋大学, 理工学部, 教授 (90393793)
HIBINO Hiroki 日本電信電話株式会社NTT 物性科学基礎研究所, 機能物質科学研究部, 部長 (60393740)
KATO Keiko 日本電信電話株式会社NTT 物性科学基礎研究所, 量子光物性研究部, 研究主任 (40455267)
SEKINE Yoshiaki 日本電信電話株式会社NTT 物性科学基礎研究所, 機能物質科学研究部, 研究主任 (70393783)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2011: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
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| Keywords | グラフェン / 超高速ダイナミクス / 時間分解光電子分光 / 表面増強ラマン散乱 / 電子位相緩和 / 高次高調波 / 時間分解ARPES / エピタキシャルグラフェン |
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| Research Abstract |
To clarify ultrafast relaxation dynamics in high quality and large-area graphene which is grown on a silicon carbide substarate by sublimating silicon, we have developed femtosecond time-resolved surface photoelectron spectroscopy based on a high-order harmonics source. By using this system, we clarified the surfce transport of photoexcited electron and hole on a semiconductor surface, thus showing the potential of this system for measuring ultrafast relaxation dynamics in graphene. We have also studied the surface-enhanced Raman scattering (SERS)of graphene grown on SiC by depositing Ag. The enhancement of the Raman spectrum in graphene reached more than 60. Moreover, we have successfully estimated a electron dephasing time of monolayer graphene to be approxiamtely 50 fs by using a time-resolved transient diffraction technique.
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Report
(4 results)
Research Products
(34 results)
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[Presentation] Ultrafast diagnostics of photo-excited processes in solid using femtosecondlaser-based soft x-ray2012
Author(s)
K. Oguri, H. Nakano, Y. Okano, T. Nishikawa, K.Kato, A. Ishizawa, T. Tsunoi, H. Gotoh, K. Tateno, and T. Sogawa
Organizer
8th International Conference on Photo-Excited Processes and Applications (ICPEPA-8)
Place of Presentation
Rochester, USA. pulse sources
Year and Date
2012-08-17
Related Report
Invited
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[Presentation] 超短パルス軟X線で見る物質の超高速ダイナミクス2012
Author(s)
小栗克弥、中野秀俊、岡野泰彬、西川正、加藤景子、石澤淳、後藤秀樹、舘野功太、寒川哲臣
Organizer
平成23年度「多元技術融合光プロセス研究会」第5回研究交流会
Place of Presentation
産業技術総合研究所臨海副都心センター別館(東京都)
Year and Date
2012-02-16
Related Report
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[Presentation] Ultrafast diagnostics of photo-excited processes in solid using femtosecond laser-based soft x-ray pulse sources2012
Author(s)
K. Oguri, H. Nakano, Y. Okano, T. Nishikawa, K. Kato, A. Ishizawa, T. Tsunoi, H. Gotoh, K. Tateno, and T. Sogawa
Organizer
8th International Conference on Photo-Excited Processes and Applications (ICPEPA-8)
Place of Presentation
Rochester, U.S. A.
Related Report
Invited
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[Presentation] Surface-enhanced Raman scattering of graphene on SiC2011
Author(s)
Yoshiaki Sekine, Hiroki Hibino, Katsuya Oguri, Tatsushi Akazaki, Hiroyuki Kageshima, Masao Nagase, Hiroshi. Yamaguchi
Organizer
6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6)
Place of Presentation
島根県立産業交流会館(くにびきメッセ)(島根県)
Year and Date
2011-08-03
Related Report
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