Ultrafast relaxation dynamics of photoexcited carriers in metallic and semiconducting single-walled carbon nanotubes

被引：23

作者：

Ichida, M

Hamanaka, Y

Kataura, H

Achiba, Y

Nakamura, A

机构：

[1] Konan Univ, Fac Sci & Engn, Nada Ku, Kobe, Hyogo 6588501, Japan

[2] PRESTo, JST, Kawaguchi, Saitama 3320012, Japan

[3] Nagoya Univ, Grad Sch Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[4] AIST, NRI, Tsukuba, Ibaraki 3058562, Japan

[5] Tokyo Metropolitan Univ, Fac Sci, Hachioji, Tokyo 1920397, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2004年 / 73卷 / 12期

关键词：

single-walled carbon nanotube; relaxation dynamics;

D O I：

10.1143/JPSJ.73.3479

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated carrier relaxation dynamics in both metallic and semiconducting single-walled carbon nanotubes by means of femtosecond pump-probe experiments. The femtosecond excitation pulse bleaches the absorption bands of both metallic and semiconducting tubes. In the metallic tubes, the change in the absorption spectra vary from bleaching to broadening. The relaxation aspects of the spectral features change from internal thermalization to electron temperature cooling. In the semiconducting tubes, the nonradiative channel governes the recovery behavior via trapping at defects in the SWNTs.

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页码：3479 / 3483

页数：5

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