Linear and nonlinear optical absorption coefficients of two-electron spherical quantum dot with parabolic potential

被引：34
作者：
Cakir, Bekir [1 ]
Yakar, Yusuf [2 ]
Ozmen, Ayhan [1 ]
机构：
[1] Selcuk Univ, Fac Sci, Dept Phys, Konya, Turkey
[2] Aksaray Univ, Fac Arts & Sci, Dept Phys, Konya, Turkey
来源：
PHYSICA B-CONDENSED MATTER | 2015年 / 458卷
关键词：
Spherical two-electron quantum dot; Parabolic potential; Linear and nonlinear absorption coefficient; QGA and HFR method; REFRACTIVE-INDEX CHANGES; CENTER HYDROGENIC IMPURITY; ELECTRONIC-STRUCTURE; HYDROSTATIC-PRESSURE; EXCITATION KINETICS; RELATIVISTIC TERMS; DONOR IMPURITY; BINDING-ENERGY; LASER FIELD; INTERPLAY;
D O I：
10.1016/j.physb.2014.11.026
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Linear and nonlinear absorption coefficients of two electron spherical quantum clot (QD) with parabolic potential are investigated in this paper. Wave functions and energy eigenvalues of the 1s(2), 1s1p, 1s1d and 1s1f electronic states have been computed by using an optimization approach, which is a combination of Quantum Genetic Algorithm (QGA) and Hartree-Fock Roothaan (I-IFR) method. It is found that the strength of S -> P transition is stronger than P -> D and D -> F transitions. Also the peak positions and amplitudes of the absorption coefficients are sensitive to the electron spin. It should be noted that the peak positions and amplitudes of absorption coefficients are strongly dependent on the parabolic potential. Additionally, dot radius, impurity charge, incident optical intensity and relaxation time have a great influence on the linear and nonlinear absorption coefficients. (C) 2014 Elsevier B.V. All rights reserved
引用
收藏
页码：138 / 143
页数：6
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