| Project/Area Number |
21760038
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
HIRORI Hideki Kyoto University, 物質-細胞統合システム拠点, 助教 (00512469)
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| Project Period (FY) |
2009 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2009: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 非線形光学 / 応用光学・量子光工学 / 光源技術 / テラヘルツ/赤外材料・素子 / ナノ材料 / 光物性 / テラヘリツ / カーボンナノチューブ / 非線形分光 / 遠赤外分光 / THz分光 / 高強度テラヘルツ / 低次元半導体 |
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| Research Abstract |
Aim of this study is to elucidate excitonic states of single-walled carbon nanotubes (SWNTs) and to develop coherent control technique with the excitonic states. For this purpose, (1) we established the method to generate single-cycle THz pulses with amplitudes with exceeding 1MV/cm electric field. (2) By developing a THz nonlinear spectroscopic method, we observe excitonic ionization under strong THz pulse with Stark effect and dynamical Frantz-Keldysh effect for both ZnSe and GaAs quantum wells. Furthermore, (3) we demonstrated for the first time that the number of carriers of GaAs quantum wells is enhanced 103 times more by irradiation of the THz pulse, eventually which leading a bright near-infrared luminescence. (4) For study THz response of single SWNTs, we developed the THz near-field microscope. With the developed THz spectroscopic technique we continue the experiment for the THz coherent control of excitonic states.
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