中国物理B ›› 2012, Vol. 21 ›› Issue (8): 87303-087303.doi: 10.1088/1674-1056/21/8/087303

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Second-harmonic generation in asymmetric quantum dots in the presence of a static magnetic field

李学超, 王安民, 王兆亮, 杨阳   

  1. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2011-12-12 修回日期:2012-03-15 出版日期:2012-07-01 发布日期:2012-07-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10975125).

Second-harmonic generation in asymmetric quantum dots in the presence of a static magnetic field

Li Xue-Chao (李学超), Wang An-Min (王安民), Wang Zhao-Liang (王兆亮), Yang Yang (杨阳)   

  1. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:2011-12-12 Revised:2012-03-15 Online:2012-07-01 Published:2012-07-01
  • Contact: Li Xue-Chao, Wang An-Min E-mail:xuechao@mail.ustc.edu.cn; anmwang@ustc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10975125).

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摘要： The second-harmonic generation (SHG) coefficient in an asymmetric quantum dot (QD) with a static magnetic field is theoretically investigated. Within the framework of the effective-mass approximation, we obtain the confined wave functions and energies of electrons in QD. We also obtain the SHG coefficient by the compact-density-matrix approach and the iterative method. The numerical results for the typical GaAs/AlGaAs QD show that the SHG coefficient depends strongly on the magnitude of magnetic field, parameters of the asymmetric potential and the radius of the QD. The resonant peak shifts with the magnetic field or the radius of the QD changing.

关键词: quantum dot, nonlinear optical rectification, magnetic field

Abstract: The second-harmonic generation (SHG) coefficient in an asymmetric quantum dot (QD) with a static magnetic field is theoretically investigated. Within the framework of the effective-mass approximation, we obtain the confined wave functions and energies of electrons in QD. We also obtain the SHG coefficient by the compact-density-matrix approach and the iterative method. The numerical results for the typical GaAs/AlGaAs QD show that the SHG coefficient depends strongly on the magnitude of magnetic field, parameters of the asymmetric potential and the radius of the QD. The resonant peak shifts with the magnetic field or the radius of the QD changing.

Key words: quantum dot, nonlinear optical rectification, magnetic field

中图分类号:  (Quantum dots)

  • 73.21.La
81.40.Rs (Electrical and magnetic properties related to treatment conditions)