2011 Fiscal Year Final Research Report
Non-equilibrium phase control of molecular conductors by intense terahertz pulse excitation
| Project/Area Number |
22684013
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics I
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| Research Institution | Keio University (2011)
The University of Tokyo (2010) |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Keywords | テラヘルツ光 / 分子性導体 / カーボンナノチューブ / 光誘起相転移 / 精密偏光計測 |
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| Research Abstract |
We performed terahertz(THz) pump experiments to investigate non-equilibrium carrier dynamics in organic materials. We achieved to generate an intense THz pulse with the peak electric-field of 0. 7 MV/cm, and THz electric-field-induced one-dimensional excitons generation in aligned semiconducting single-walled carbon nanotubes was observed at room temperature. The non-equilibrium dynamics of the charge-ordered phase ofθ-(BEDT-TTF)_2CsZn(SCN)_4 was investigated by the THz-pump and THz-probe experiments, and the transmission change in the THz spectral region was observed by performing the THz pulse excitation. Finally, we proposed and developed a method to quickly and precisely determine the polarization direction of THz pulses for investigating an electron spin dynamics in organic materials for future studies.
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