Linear and nonlinear intersubband optical absorption in a disk-shaped quantum dot with a parabolic potential plus an inverse squared potential in a static magnetic field

被引：74

作者：

Liu, Guanghui ^{[1
]}

Guo, Kangxian ^{[1
]}

Wang, Chao ^{[2
]}

机构：

[1] Guangzhou Univ, Dept Phys, Coll Phys & Elect Engn, Guangzhou 510006, Guangdong, Peoples R China

[2] Guangzhou Univ, Inst Publ Adm, Guangzhou 510006, Guangdong, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2012年 / 407卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Quantum dots; Optical absorption; Magnetic field; IMPURITY BINDING-ENERGY; HYDROGENIC IMPURITY; LASER FIELD; WELL; INTENSE; RECTIFICATION; PRESSURE;

D O I：

10.1016/j.physb.2012.03.030

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The linear and nonlinear optical absorption in a disk-shaped quantum dot (DSQD) with parabolic potential plus an inverse squared potential in the presence of a static magnetic field are theoretically investigated within the framework of the compact-density-matrix approach and iterative method. The energy levels and the wave functions of an electron in the DSQD are obtained by using the effective mass approximation. Numerical calculations are presented for typical GaAs/AlAs DSQD. It is found that the optical absorption coefficients are strongly affected not only by a static magnetic field, but also by the strength of external field, the confinement frequency and the incident optical intensity. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2334 / 2339

页数：6

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