Optical properties of hydrogenic impurity in an inhomogeneous infinite spherical quantum dot

被引：14
|
作者：
Jafari, A. R. [1 ]
机构：
[1] Islamic Azad Univ, Dept Phys, Lamerd Branch, Lamerd, Iran
来源：
PHYSICA B-CONDENSED MATTER | 2015年 / 456卷
关键词：
Quantum dots and anti-dots; Optical intensity; Refractive index; Absorption coefficient; REFRACTIVE-INDEX CHANGES; INTERSUBBAND ELECTRONIC-TRANSITIONS; ABSORPTION-COEFFICIENTS; OSCILLATOR-STRENGTHS; BINDING-ENERGY; DONOR IMPURITY; STATES;
D O I：
10.1016/j.physb.2014.08.010
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In the present work, using the effective mass approximation, the Schrodinger equation of system is solved in terms of Whittaker functions. The linear and third-order nonlinear optical absorption coefficient (AC) as well as refractive index (RI) changes associated with two intersubbund transitions (1s-2p and 2p-3d) in the case of a GaAs inhomogeneous infinite spherical quantum dot are investigated at different inner radii of shell and shell thicknesses. Regarding this, the optical properties of hydrogenic system are studied by means of compact density approach and dipole approximation. The results show that the system under study is strongly affected by inner radius of shell and shell thickness changes. Also it was found that the transition between orbital with bigger l value shift to higher photon energy region. (C) 2014 Elsevier B.V. All rights reserved
引用
收藏
页码：72 / 77
页数：6
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