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
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
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.
Received: 20 August 2003
Revised: 02 March 2004
Accepted manuscript online:
Fund: 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).
Cite this article:
Xiao Xian-Bo (肖贤波), Zhou Guang-Hui (周光辉), Yang Mou (杨谋), Li Yuan (李源), Xu Zhi-Feng (徐志峰) THz-field-induced electronic transmission step-structure for a quantum wire 2004 Chinese Physics 13 1531
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