A study of electric-field-induced second-harmonic generation in asymmetrical Gaussian potential quantum wells

被引：35

作者：

Zhai, Wangjian ^{[1
]}

机构：

[1] Yulin Normal Univ, Coll Phys Sci & Technol, Yulin 537000, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2014年 / 454卷

关键词：

Second-harmonic generation; Gaussian potential; Quantum wells; Electric field; NONLINEAR-OPTICAL RECTIFICATION; HYDROSTATIC-PRESSURE; PLASMON RESONANCES; PHONON INTERACTION; DOTS; SPECTROSCOPY; ABSORPTION; SINGLE; IMPURITY;

D O I：

10.1016/j.physb.2014.07.030

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electric-field-induced second-harmonic generation in asymmetrical Gaussian potential quantum wells is investigated using the effective mass approximation employing the compact density matrix method and the iterative approach. Our results show that the absolute value, the real part and the imaginary part of second-harmonic generation are greatly affected by the height of the Gaussian potential quantum wells, the range of the Gaussian confinement potential and the applied electric field. The relationship between the absolute value and the imaginary part of second-harmonic generation together with the relationship between the absolute value and the real part of second-harmonic generation is studied. It is found that no matter how the height of the Gaussian potential quantum wells, the range of the Gaussian confinement potential and the applied electric field vary, the resonant peaks of the absolute value of second-harmonic generation do not originate from the imaginary part but from the real part. (C) 2014 Elsevier B.V. All rights reserved

引用

页码：50 / 55

页数：6

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