2010 Fiscal Year Final Research Report
Elucidation and coherent control of excitonic states of carbon nanotubes
| 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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| Keywords | 非線形光学 |
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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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[Remarks] 業績論文(1)(Applied Physics Letters誌、査読有、98巻、2011、091106-1-091106-3) Nature Photonics誌に注目論文として採択される[Nature Photonics 5, 250.251(2011)]
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[Remarks] 業績論文(3)(Physical Review B Rapid Comunications誌、査読有、81巻,2010、81305-081308)編集者の注目論文として採択される(Editor's Suggestion)
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