正切平方势量子阱的光整流特性

Optical rectification in square tangent quantum wells

从理论上研究了正切平方势量子阱的光整流特性。利用有效质量近似,通过对系统的薛定谔方程的求解,得到了系统的能级与波函数。使用密度矩阵理论和迭代法,给出了系统的光整流的表达式。结果表明:随着限制势高度V0的增大,光整流的峰值逐渐变小,并且向着能量高的区域移动;当限制势宽度d逐渐增加,光整流的峰值也在增大,且向着低能量方向移动。

The optical rectification of square tangent quantum well is investigated theoretically.By solving the Schrodinger equation of the square tangent quantum wells under the effective-mass approximation,both the energy level and wave function of the system are obtained.The optical rectification is calculated by using the density-matrix approach and iterative method.The results obtained from the system show that with the increase of the confined potential height V0,the resonance peak value of the optical rectification gradually decreases and move towards areas with high energy;the resonance peak value of the optical rectification increases with increasing the confined potential width d,and move towards the direction of low energy.