Hydrostatic pressure and electric field effects and nonlinear optical rectification of confined excitons in spherical quantum dots

被引：55
|
作者：
Duque, C. M. [1 ]
Mora-Ramos, M. E. [2 ]
Duque, C. A. [1 ]
机构：
[1] Univ Antioquia, Inst Fis, Medellin 1226, Colombia
[2] Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62209, Morelos, Mexico
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2011年 / 49卷 / 03期
关键词：
Quantum dots; Nonlinear optical rectification; WELLS; MODEL;
D O I：
10.1016/j.spmi.2010.06.008
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The effects of hydrostatic pressure and applied electric field on an interacting electron-hole pair in a semiparabolic quantum dot are studied under the density-matrix formalism and the effective-mass approximation. The binding energies of the first confined exciton states are calculated as a function of the confinement strength. The nonlinear optical rectification is also studied as a function of the hydrostatic pressure, the applied electric field, and the confinement strength. The results show that the resonant peak of the nonlinear optical rectification can be red or blue shifted by external probes such as hydrostatic pressure, applied electric field, and the confinement strength. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：264 / 268
页数：5
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