抛物型量子点的非线性光学整流研究

在紧凑密度矩阵方法和迭代法的框架下，从理论上研究了抛物型量子点（QDs）在不同的量子点半径、宽度以及外加电场和磁场下光学整流（OR）系数。在有效质量近似下，计算了量子点中电子的受限波函数和能量。给出了典型GaAs/AlGaAs抛物型量子点的数值结果。通过研究发现，非线性光学整流系数受到量子点的宽度、半径以及电场和磁场的强烈影响。在考虑电场和磁场的影响时，峰值向高能量方向移动。

NONLINEAR OPTICAL RECTIFICATION OF PARABOLIC QUANTUM DOTS

In this paper, using the framework of compact density matrix method and iterative method, the optical rectification (OR) coefficients of parabolic quantum dots (QDs) under different quantum dot radii, widths, and applied electric and magnetic fields were studied. Under the effective mass approximation, the confined wave function and energy of electrons in quantum dots were calculated. The numerical results of typical GaAs/AlGaAs parabolic quantum dots were calculated. It showed that the nonlinear optical rectification coefficient was strongly affected by the width and radius of the quantum dot, as well as the electric and magnetic fields. When the influence of electric and magnetic fields was considered, the peak shift toward higher energy.