|
|||||
|
|
Diameter-dependent relaxation dynamics of 1D excitons in single-walled carbon nanotubes |
|
| Authors: | Masao Ichida Satoshi Sakoda Yumie Kiyohara Singo Saito Yasumitsu Miyata Hiromichi Kataura Ken-ichi Mizuno Hiroaki Ando |
| Affiliation: | 1. Faculty of Science and Engineering, Konan University, 8-9-1 Okamoto, Higashinada-ku, Kobe 658-8501, Japan;2. Quantum Nanotechnology Laboratory, Konan University, 8-9-1 Okamoto, Higashinada-ku, Kobe 658-8501, Japan;3. National Institute for Information and Communications Technology, 588-2 Iwaoka, Nishi-ku, Kobe 651-2492, Japan;4. Faculty of Science, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo 192-0397, Japan;5. Nanotechnology Research Institute, AIST, Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562, Japan;1. Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain;2. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, 28049 Madrid, Spain;3. Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain |
| 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 ΔT/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. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |