Please use this identifier to cite or link to this item: http://repository.vnu.edu.vn/handle/VNU_123/27065
Title: Negative absorption coefficient of a weak electromagnetic wave caused by electrons confined in rectangular quantum wires in the presence of laser radiation
Authors: Nguyen, Quang Bau
Nguyen, Thi Thanh Nhan
Nguyen, Vu Nhan
Keywords: Rectangular quantum wires;Absorption coefficient;Electron-phonon interaction;Laser radiation
Issue Date: 2014
Publisher: H. : ĐHQGHN
Citation: ISIKNOWLEDGE
Abstract: Analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by electrons confined in rectangular quantum wires (RQWs) in the presence of laser radiation are calculated using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering. The dependence of the ACF of a weak EMW on the intensityE01 and the frequency Ω1 of the external laser radiation, the intensityE02 and the frequency Ω2 of the weak EMW, the temperature Tof the system and the sizeL(LxandLy) of the RQWs is obtained. The results are numerically calculated and discussed forGaAs/GaAsAlRQWs. The numerical results show that the ACF of a weak EMW in RQWs can have negative values. Thus, in the presence of laser radiation, under proper conditions, a weak EMW is increased. This is different from the similar problem in bulk semiconductors and from the case without laser radiation
Description: JOURNAL OF THE KOREAN PHYSICAL SOCIETY Volume: 64 Issue: 4 Pages: 572-578 Published: FEB 2014
URI: http://repository.vnu.edu.vn/handle/VNU_123/27065
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