Effects of an electric field on the confined hydrogen impurity states in a spherical parabolic quantum dot

被引：63

作者：

He, Lili ^{[1
]}

Xie, Wenfang ^{[1
]}

机构：

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

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2010年 / 47卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Quantum dots; Impurity; Nonlinear optics; NONLINEAR-OPTICAL RECTIFICATION; BINDING-ENERGY; DONOR IMPURITY; SUPERLATTICES;

D O I：

10.1016/j.spmi.2009.10.015

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

in this paper, we studied the effects of an electric field on a hydrogenic impurity confined in a spherical parabolic quantum dot using nondegenerate and degenerate perturbation methods. The binding energies of the ground and three low-excited states are calculated as a function of the confinement strength and as a function of the intensity of an applied electric field. Moreover, we computed the oscillator strength and the second-order nonlinear optical rectification coefficient based on the computed energies and wave functions. The results show that the electric and optical properties of hydrogenic impurity states are strongly affected by the confinement strength and the applied electric field. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：266 / 273

页数：8

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