中国物理B ›› 2004, Vol. 13 ›› Issue (9): 1531-1536.doi: 10.1088/1009-1963/13/9/029
肖贤波1, 周光辉1, 李源1, 徐志峰1, 杨谋2
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
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.
中图分类号: (Quantum wires)