Diameter-dependent relaxation dynamics of 1D excitons in single-walled carbon nanotubes

被引：3
|
作者：
Ichida, Masao [1 ,2 ]
Sakoda, Satoshi [1 ]
Kiyohara, Yumie [1 ]
Saito, Singo [3 ]
Miyata, Yasumitsu [4 ,5 ]
Kataura, Hiromichi [5 ]
Mizuno, Ken-ichi [1 ,2 ]
Ando, Hiroaki [1 ,2 ]
机构：
[1] Konan Univ, Fac Sci & Engn, Higashinada Ku, Kobe, Hyogo 6588501, Japan
[2] Konan Univ, Quantum Nanotechnol Lab, Higashinada Ku, Kobe, Hyogo 6588501, Japan
[3] Natl Inst Informat & Commun Technol, Nishi Ku, Kobe, Hyogo 6512492, Japan
[4] Tokyo Metropolitan Univ, Fac Sci, Tokyo 1920397, Japan
[5] AIST, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058562, Japan
来源：
JOURNAL OF LUMINESCENCE | 2008年 / 128卷 / 5-6期
关键词：
carbon nanotubes; exciton-phonon interaction; nonradiative relaxation;
D O I：
10.1016/j.jlumin.2007.11.037
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 A TIT 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. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：952 / 955
页数：4
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