Linear and nonlinear optical susceptibilities in a laterally coupled quantum-dot-quantum-ring system

被引：36

作者：

Zeng, Zaiping ^{[1
]}

Garoufalis, Christos S. ^{[1
]}

Baskoutas, Sotirios ^{[1
]}

机构：

[1] Univ Patras, Dept Mat Sci, Rion 26504, Greece

来源：

PHYSICS LETTERS A | 2014年 / 378卷 / 36期

关键词：

Optical susceptibilities; Quantum dot; Quantum ring; HYDROSTATIC-PRESSURE; ABSORPTION-COEFFICIENTS; ALUMINUM CONCENTRATION; MAGNETIC-FIELD; DONOR IMPURITY; RECTIFICATION;

D O I：

10.1016/j.physleta.2014.07.036

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Linear and nonlinear optical susceptibilities in a laterally coupled quantum-dot-quantum-ring system have been theoretically studied. In general, we find that the structure parameters of the coupled system significantly affect the optical susceptibilities. The enhancement of the coupling effects between the dot and ring is found to increase considerably the optical susceptibilities and redshift drastically the transition energies. Comparing to the linear susceptibility, the nonlinear optical susceptibility is found to be more sensitive to the variation of the structure parameters. A comprehensive analysis of the electron probability density movement with respect to the modification of the structure parameters is provided, which offers a unique perspective of the ground-state localization. (C) 2014 Elsevier BM. All rights reserved.

引用

页码：2713 / 2718

页数：6

共 42 条

[1] Donor impurity-related linear and nonlinear optical absorption coefficients in GaAs/Ga1-xAxAs concentric double quantum rings: Effects of geometry, hydrostatic pressure, and aluminum concentration [J].