中国物理B ›› 2004, Vol. 13 ›› Issue (9): 1531-1536.doi: 10.1088/1009-1963/13/9/029

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THz-field-induced electronic transmission step-structure for a quantum wire

肖贤波1, 周光辉1, 李源1, 徐志峰1, 杨谋2   

  1. (1)Department of Physics, Hunan Normal University, Changsha 410081, China; (2)National Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2003-08-20 修回日期:2004-03-02 出版日期:2004-06-21 发布日期:2005-06-21
  • 基金资助:
    Project supported by the Natural Science Foundation of Hunan Province, China (Grant No 02JJY2008) and the Research Foundation of Hunan Education Commission, China (Grant No 2202527).

THz-field-induced electronic transmission step-structure for a quantum wire

Xiao Xian-Bo (肖贤波)a, Zhou Guang-Hui (周光辉)a, Yang Mou (杨谋)b, Li Yuan (李源)a, Xu Zhi-Feng (徐志峰)a   

  1. a Department of Physics, Hunan Normal University, Changsha 410081, China; b National Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • Received:2003-08-20 Revised:2004-03-02 Online:2004-06-21 Published:2005-06-21
  • Supported by:
    Project supported by the Natural Science Foundation of Hunan Province, China (Grant No 02JJY2008) and the Research Foundation of Hunan Education Commission, China (Grant No 2202527).

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摘要： We study theoretically the low-temperature electronic transport property of a straight quantum wire under the irradiation of a finite-range transversely polarized external terahertz (THz) electromagnetic (EM) field. Using the free-electron model and the scattering matrix approach, we show an unusual behaviour of the electronic transmission of this system. A sharp step-structure appears in the electronic transmission probability as the EM field strength increases to a threshold value when a coherent EM field is applied. We demonstrate that this effect physically comes from the inelastic scattering of electrons with lateral photons through intersubband transitions.

关键词: quantum wires, THz electromagnetic field, electronic transmission, scattering matrix

Abstract: We study theoretically the low-temperature electronic transport property of a straight quantum wire under the irradiation of a finite-range transversely polarized external terahertz (THz) electromagnetic (EM) field. Using the free-electron model and the scattering matrix approach, we show an unusual behaviour of the electronic transmission of this system. A sharp step-structure appears in the electronic transmission probability as the EM field strength increases to a threshold value when a coherent EM field is applied. We demonstrate that this effect physically comes from the inelastic scattering of electrons with lateral photons through intersubband transitions.

Key words: quantum wires, THz electromagnetic field, electronic transmission, scattering matrix

中图分类号:  (Quantum wires)

  • 73.63.Nm
02.10.Yn (Matrix theory)