中国物理B ›› 2005, Vol. 14 ›› Issue (10): 2137-2140.doi: 10.1088/1009-1963/14/10/036
宋礼1, 解思深1, 汪国平2, 龙拥兵3, 张春雨4, 汪力4, 傅盘铭4, 张治国4
Long Yong-Bing (龙拥兵)ab, Song Li (宋礼)c, Zhang Chun-Yu (张春雨)b, Wang Li (汪力)b, Fu Pan-Ming (傅盘铭)b, Zhang Zhi-Guo (张治国)b, Xie Si-Shen (解思深)c, Wang Guo-Ping (汪国平)a #br#
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 $\pi$-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.
中图分类号: (Spectroscopy of solid state dynamics)