Magnetoabsorption spectra of magnetoexciton transitions in GaAs/Ga_(0.7)Al_(0.3)As quantum wells  

作　　者：米贤武 李德俊 孟凡斌 赵鹤平 

机构地区：[1]College of Physics Science and Information Engineering,Jishou University

出　　处：《Chinese Optics Letters》2009年第4期335-338,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.10647132);the Scientific Research Fund of Hunan Provincial Education Department (No.05B014).

摘　　要：The internal transitions and absorption spectra of confined magnetoexcitons in GaAs/Ga0.TA10.aAs quan- tum wells have been theoretically investigated under magnetic fields along the growth direction of the semiconductor heterostructure. The magnetoexciton states are obtained within the effective-mass ap- proximation by using a variational procedure. The trial exciton-envelope wavefunctions are described as hydrogeniclike polynomial functions. The internal transition energies are investigated by studying the allowed magnetoexcitonic transitions using terahertz radiation circularly polarized in the plane of the quantum well. The intraexcitonic magnetoabsorption to 2p^± like magnetoexciton states as functions of the coefficients are obtained for transitions from 1s-like applied magnetic field.The internal transitions and absorption spectra of confined magnetoexcitons in GaAs/Ga0.TA10.aAs quan- tum wells have been theoretically investigated under magnetic fields along the growth direction of the semiconductor heterostructure. The magnetoexciton states are obtained within the effective-mass ap- proximation by using a variational procedure. The trial exciton-envelope wavefunctions are described as hydrogeniclike polynomial functions. The internal transition energies are investigated by studying the allowed magnetoexcitonic transitions using terahertz radiation circularly polarized in the plane of the quantum well. The intraexcitonic magnetoabsorption to 2p^± like magnetoexciton states as functions of the coefficients are obtained for transitions from 1s-like applied magnetic field.

关 键 词：Aluminum Magnetic fields Semiconductor growth Semiconductor quantum dots 

分 类 号：O471.1[理学—半导体物理] TN4[理学—物理]