New oscillation in terahertz magneto-optical effect of single-walled carbon nanotubes film

被引：1
|
作者：
Han, JG
Zhu, ZY
Liao, Y
Wang, ZX
Zhang, W
Sun, LT
Wang, TT
机构：
[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[2] Chinese Acad Sci, Yunnan Astron Observ, Kunming 650011, Peoples R China
来源：
CARBON | 2004年 / 42卷 / 8-9期
关键词：
carbon nanotubes; modeling; photoconductivity;
D O I：
10.1016/j.carbon.2004.03.010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The magneto-optical Kerr effect of single-walled carbon nanotubes (SWNTs) film in the Terahertz region is theoretically studied by means of the Drude model. The calculation shows a new oscillation occurring near the plasma frequency as the origin of the magneto-optical Kerr effect for the single-walled nanotubes film. We propose that the amplitude of this near plasma frequency oscillation is directly proportional to the external magnetic field and its period increases with increasing cyclotron frequency. We consider these features of this oscillation of SWNTs are related to the Landau energy of SWNTs. The reflectivity and figure of merit (FOM) spectrum also reveal that this oscillation is the dominant mechanism for the magneto-optical Kerr effect of SWNTs film. Meanwhile, the shift and large enhancement of Kerr rotation under different external magnetic fields is explained. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1793 / 1798
页数：6
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