J4 ›› 2010, Vol. 27 ›› Issue (4): 441-447.

• 非线性光学 • 上一篇    下一篇

电子-声子相互作用对非对称Morse势阱中光整流效应的影响

于凤梅1,郭康贤2,王克强1   

  1. 1仲恺农业工程学院信息学院,广东 广州 510225;
    2 广州大学物理与电子工程学院物理系,广东 广州 510006
  • 收稿日期:2009-11-02 修回日期:2010-03-05 出版日期:2010-07-28 发布日期:2010-06-13
  • 通讯作者: 于凤梅(-1976),女,辽宁丹东人,仲恺农业工程学院教师,硕士,讲师,研究方向主要为低维量子系统中的非线性光学效应。 E-mail:yufengmei401@126.com
  • 基金资助:

    广东省教育厅育苗工程项目(LYM08068); 广州市科技计划项目(2009J1-C421-1)

Electron-phonon interaction effects on the optical rectification in asymmetrical Morse quantum wells

YU Feng-mei1 , Guo Kang-xian2,Wang Ke-qiang1   

  1. 1 Information College, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China;
    2 Department of Physics, College of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China
  • Received:2009-11-02 Revised:2010-03-05 Published:2010-07-28 Online:2010-06-13

摘要:

从理论上研究了电声相互作用对Morse势阱中光整流效应的影响,首先利用微扰论的方法求解在考虑电声相互作用时Morse量子阱的波函数和能级, 然后采用密度矩阵方法和迭代法得到光整流系数,最后以典型的GaAs/AlGaAs Morse 势阱为例进行数值计算。数值结果表明在考虑电声相互作用后,获得的光整流系数比仅考虑电子情况的大15%~30%左右。并且电声相互作用使光整流系数峰值向高能方向偏移。因此要得到比较精确的结果,有必要考虑电声相互作用的影响。

关键词: 非线性光学, 光整流效应, 电声相互作用, Morse势阱

Abstract:

The effect of the electron-phonon interaction on the optical rectification (OR) is theoretically studied for electrons confined in Morse quantum wells. The wave functions and energy levels are described by perturbation theory when considering the electron-phonon interaction, and analytic expression for the optical rectification is obtained by the compact density method and the iterative procedure. The numerical results for typical GaAs/AlGaAs material show that the optical rectification with considering the electron-phonon interaction is over fifteen percent to thirty percent greater than the one without considering the electron-phonon interaction. Furthermore, the correction of electron–phonon interaction effect on the energies of the electron makes the peak shift to the aspect of the high energy.

Key words: nonlinear optics, optical rectification, electron-phonon interaction, Morse quantum well