| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5403571 | Journal of Luminescence | 2008 | 4 Pages |
Abstract
We have studied 1D exciton relaxation dynamics in semiconducting single-walled carbon nanotubes (SWNTs) by femtosecond pump-probe experiments. The time evolution of change in transmittance ÎT/T induced by photo-excitation varies depending on the tube diameter. The decay time decreases with a decrease in the tube diameter. Pressure measurements have been conducted to explore the relaxation mechanism. The deformation potential estimated from the pressure dependence of photoluminescence spectra increases with decreasing tube diameter. This means that the exciton-phonon interaction becomes stronger in the smaller diameter tubes. The diameter dependences of decay time and deformation potential suggest that the exciton-phonon interaction plays an important role in exciton nonradiative relaxation process in semiconducting SWNTs.
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Authors
Masao Ichida, Satoshi Sakoda, Yumie Kiyohara, Singo Saito, Yasumitsu Miyata, Hiromichi Kataura, Ken-ichi Mizuno, Hiroaki Ando,