量子电子学报, 2003, 20 (6): 661, 网络出版: 2006-05-15  

Poschl-Teller势阱中二次谐波产生系数的计算

Optical Secong-Harmonic Generation in the Poschl-Teller Well
作者单位
1 佛山科学技术学院理学院物理系,佛山,528000
2 广州大学理学院物理系,广州,510405
摘要
二阶非线性光学效应是非线性光学中人们发现最早,研究最多,应用最广的一个课题.在非对称性势阱中,二次谐波产生系数与势阱的形状及其非对称性程度有很大的关系.本文用量子力学中密度矩阵算符理论导出了P(o)schl-Teller势阱中二次谐波产生系数和解析表达式.考虑到在P(o)schl-Teller势阱中有两个可调参数κ和λ,并且势阱的形状与对称性随κ和λ取值的不同而明显不同,因此我们可以通过调节κ和λ的取值而获得P(o)schl-Teller势阱中的二次谐波产生系数的变化规律,并找到其最大值,从而为实验提供必要的研究方向与理论依据.
Abstract
Nonlinear optics of low-dimensional semiconductor structures has recently attracted considerable attention. The problem is very important to the development of super-lattice devices such as fast infrared detectors and modulators because one needs to know the range of input optical intensities for which linear operation is possible. Analytical expression of the second-harmonic generation (SHG) coefficients is obtained in the Poschl-Teller well using the density matrix formalism taking into account the intrasubband relaxation. Since there are two adjustable parameters K and A in the Poschl-Teller well, the shape of the well will change with the change of the parameters K and A, accordingly the SHG coefficient will change with the parameters K and A. It is shown that the SHG coefficient depends on the parameter K , A and the tunnel bandwith. Numerical results are presented for a typical AlGaAs/GaAs Poschl-Teller well.

谭鹏, 李斌, 路洪, 郭康贤. Poschl-Teller势阱中二次谐波产生系数的计算[J]. 量子电子学报, 2003, 20(6): 661. 谭鹏, 李斌, 路洪, 郭康贤. Optical Secong-Harmonic Generation in the Poschl-Teller Well[J]. Chinese Journal of Quantum Electronics, 2003, 20(6): 661.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!