Second-harmonic generation in asymmetric quantum dots in the presence of a static magnetic field  

作　　者：李学超 王安民 王兆亮 杨阳 

机构地区：[1]Department of Modern Physics,University of Science and Technology of China

出　　处：《Chinese Physics B》2012年第8期449-452,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10975125)

摘　　要：The second-harmonic generation （SHG） coefficient in an asymmetric quantum dot （QD） with a static magnetic field is theoretically investigated. Within the framework of the effective-mass approximation, we obtain the confined wave functions and energies of electrons in the QD. We also obtain the SHC coefficient by the compact-density-matrix approach and the iterative method. The numerical results for the typical GaAs/AlGaAs QD show that the SHC coefficient depends strongly on the magnitude of magnetic field, parameters of the asymmetric potential and the radius of the QD. The resonant peak shifts with the magnetic field or the radius of the QD changing.The second-harmonic generation （SHG） coefficient in an asymmetric quantum dot （QD） with a static magnetic field is theoretically investigated. Within the framework of the effective-mass approximation, we obtain the confined wave functions and energies of electrons in the QD. We also obtain the SHC coefficient by the compact-density-matrix approach and the iterative method. The numerical results for the typical GaAs/AlGaAs QD show that the SHC coefficient depends strongly on the magnitude of magnetic field, parameters of the asymmetric potential and the radius of the QD. The resonant peak shifts with the magnetic field or the radius of the QD changing.

关 键 词：quantum dot nonlinear optical rectification magnetic field 

分 类 号：O471.1[理学—半导体物理]