摘要
研究了正切平方势阱中的线性与非线性光学吸收系数。使用密度矩阵近似的方法推导了该势阱中的线性与三阶非线性光学吸收系数的表达式;以典型的AlGaAs/GaAs正切平方势阱为例计算了该系统中的线性与三阶非线性光学吸收系数的大小,数值计算结果表明,势阱的形状和入射光强对该势阱中的光学吸收系数有着重要的影响。
The linear and nonlinear optical absorptions in square tangent quantum well were investigated. Analytic forms of the linear and third-order nonlinear optical absorption coefficients were derived using the compact density matrix approach method. Based on this model~ the numerical results were presented for a typical AIGaAs/GaAs square tangent quantum well. The calculated results show that the shape of quantum well and incident optical intensity have great influence on the optical absorption coefficients in square tangent quantum well.
出处
《量子电子学报》
CAS
CSCD
北大核心
2013年第3期330-334,共5页
Chinese Journal of Quantum Electronics
基金
Supported by the National Natural Science Foundation of China(61178030)
Guangdong Natural Science Foundation(S2011010001224)
关键词
非线性光学
正切平方势阱
吸收系数
密度矩阵近似
nonlinear optics
square tangent quantum well
absorption coefficient
density matrix approach
