Third-order nonlinear optical susceptibility of a donor in elliptical quantum dots

被引：65
|
作者：
Xie, Wenfang [1 ]
机构：
[1] Guangzhou Univ, Sch Phys & Elect Engn, Guangzhou 510006, Guangdong, Peoples R China
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2013年 / 53卷
基金：
中国国家自然科学基金;
关键词：
Quantum dot; Anisotropy; Donor; COULOMB ISLAND; ELECTRON; SPECTRUM; STATES;
D O I：
10.1016/j.spmi.2012.09.009
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The optical properties of a donor in anisotropic quantum dots with elliptical shape are investigated. Calculations are performed by using the variational method and the compact-density-matrix approach within the effective mass approximation. We have investigated the effects of the geometrical size and the degree of anisotropy on the oscillator strength and the third-order susceptibility of third harmonic generation. The results show that the dot anisotropy and the dot size play a fundamental role in determining the nonlinear optical properties of quantum dots. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：49 / 54
页数：6
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