Nonlinear optical rectification in asymmetric quantum dots with an external static magnetic field

被引：15
|
作者：
Li, Xuechao [1 ]
Zhang, Chaojin [2 ]
Tang, Yongxin [1 ]
Wang, Bing [1 ]
机构：
[1] Anhui Univ Sci & Technol, Sch Sci, Huainan 232001, Peoples R China
[2] Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Peoples R China
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2014年 / 56卷
基金：
中国国家自然科学基金;
关键词：
Quantum dot; Magnetic field; Nonlinear optical rectification; ELECTRIC-FIELD; INTERBAND ABSORPTION; DONOR IMPURITY; WELLS; SUSCEPTIBILITY; GENERATION; WIRES;
D O I：
10.1016/j.physe.2013.08.025
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The optical rectification (OR) coefficient in asymmetric quantum dots (QDs) with an external static magnetic field is theoretically investigated. Using the effective-mass approximation, we obtain the confined wave functions and energies of electrons in QDs. We also obtain the OR coefficient by the compact-density-matrix approach and the iterative method. The results of numerical calculations for the typical GaAs/AlGaAs QDs show that the OR coefficient depends strongly on the external static magnetic field, parameters of the asymmetric potential and radius of the QD. Moreover, the peak of the OR coefficient shifts with the magnetic field or the radius of the QD changing. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：130 / 133
页数：4
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