| Project/Area Number |
25600113
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Optical engineering, Photon science
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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) |
2013-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
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| Keywords | フォノンポラリトン / イメージング / 量子制御 / フェムト秒 |
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| Research Abstract |
We have developed single-shot time-frequency imaging spectroscopy with an echelon mirror, for visualizing ultrafast wavepacket propagations in time-frequency space. Using this new spectroscopy combined with pulse-shaping techniques, the phonon-polariton propagations of ferroelectric materials and graphene were successfully detected. In graphene, we found that the coherent nano-scale optical-phonon wavepacket can be excited by an impulsive excitation of inter-Dirac-cone scattering at graphene edges. On the other hand, in ferroelectric LiNbO3, we could coherently control the backward- and forward-propagating phonon-polaritons by double pump excitations.
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