| Project/Area Number |
26610083
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | Yokohama National University |
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Principal Investigator |
TAKEDA Jun 横浜国立大学, 工学(系)研究科(研究院), 教授 (60202165)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Hideyuki 産業技術総合研究所, 電子光技術研究部門, 研究員 (50392684)
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| Project Period (FY) |
2014-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | フェムト秒分光 / コヒーレント制御 / 単層膜 / 電子・格子結合ダイナミクス / 電場増強 / フェムト秒 |
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| Outline of Final Research Achievements |
In this research, our objective is to reveal the electron-phonon coupling dynamics and coherently control the high-frequency vibrations in monolayers via surface-enhanced Raman scattering processes. To achieve this objective, we have constructed a pulse-shaping technique with a sub 10-fs laser system, a programmable spatial light modulator, negative chirp mirrors and a pair of wedges. Using this technique, we could successfully demonstrate the coherent control of the high-frequency phonons over 10 THz in standard reference materials: GaAs and ferroelectric LiNbO3. Using the sub 10-fs coherent phonon spectroscopy coupled with the electric-field enhancement due to gold (Au) or silver (Ag) nanostructures, we sensitively measured high-frequency coherent vibrations in benzenethiol self-assembled monolayer adsorbed on Au film and cyclopentadithiophene adsorbed on Ag nano-particles.
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