| Ultrafast carrier dynamics in purified and as-grown single-walled carbon nanotube films |
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| 作者姓名： | 龙拥兵 宋礼 张春雨 汪力 傅盘铭 张治国 解思深 汪国平 |
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| 作者单位： | Department of Physics, Wuhan University, Wuhan 430072, China;Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Center for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China;Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Center for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China;Department of Physics, Wuhan University, Wuhan 430072, China |
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| 基金项目： | Project supported by the Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences. |
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| 摘 要： | Ultrafast time-resolved optical transmissions in purified and as-grown single-walled carbon nanotube films are measured at a temperature of 200K. The signal of the purified sample shows a crossover from photobleaching to photoabsorption. The former and the latter are interpreted as the state filling and the red shift of the π-plasmon, respectively. The signal of the as-grown sample can be perfectly fitted by a single-exponential with a time constant of 232fs. The disappearance of the negative component in the as-grown sample is attributed to the charge transfer between the semiconducting nanotubes and the impurities.
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| 关 键 词： | carbon nanotubes carrier dynamics ∏-plasmon resonance charge transfer |
| 收稿时间： | 2/3/2005 12:00:00 AM |
| 修稿时间： | 2005-02-032005-06-16 |
Ultrafast carrier dynamics in purified and as-grown single-walled carbon nanotube films |
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| Long Yong-Bing,Song Li,Zhang Chun-Yu,Wang Li,Fu Pan-Ming,Zhang Zhi-Guo,Xie Si-Shen and Wang Guo-Ping.Ultrafast carrier dynamics in purified and as-grown single-walled carbon nanotube films[J].Chinese Physics B,2005,14(10):2137-2140. |
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| Authors: | Long Yong-Bing Song Li Zhang Chun-Yu Wang Li Fu Pan-Ming Zhang Zhi-Guo Xie Si-Shen and Wang Guo-Ping |
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| Institution: | Center for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China; Department of Physics, Wuhan University, Wuhan 430072, China; Department of Physics, Wuhan University, Wuhan 430072, China;Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Ultrafast time-resolved optical transmissions in purified and as-grown
single-walled carbon nanotube films are measured at a temperature of 200K.The signal of the purified sample shows a crossover from photobleaching to photoabsorption. The former and the latter are interpreted as the state filling and the red shift of the $\pi$-plasmon, respectively. The signal of the as-grown sample can be perfectly fitted by a single-exponential with a time constant of 232fs. The disappearance of the negative component in the as-grown sample is attributed to the charge transfer between the semiconducting nanotubes and the impurities. |
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| Keywords: | carbon nanotubes carrier dynamics zr-plasmon resonance charge transfer |
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