Nonlinear optical properties of a Woods-Saxon quantum dot under an electric field

被引：23

作者：

Aytekin, O. ^{[1
]}

Turgut, S. ^{[2
]}

Unal, V. Ustoglu ^{[3
]}

Aksahin, E. ^{[3
]}

Tomak, M. ^{[2
]}

机构：

[1] Adiyaman Univ, Dept Phys, TR-02040 Adiyaman, Turkey

[2] Middle E Tech Univ, Dept Phys, TR-06531 Ankara, Turkey

[3] Yeditepe Univ, Dept Phys, TR-34755 Istanbul, Turkey

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2013年 / 54卷

关键词：

Quantum dot; Nonlinear optic; Electric field; Woods-Saxon; DONOR IMPURITIES; ABSORPTIONS; EXCITON; LASER; WELL;

D O I：

10.1016/j.physe.2013.06.004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A theoretical study of the effect of the confining potential on the nonlinear optical properties of two dimensional quantum dots is performed. A three-parameter Woods-Saxon potential is used within the density matrix formalism. The control of confinement by three parameters and an applied electric field gives one quite an advantage in studying their effects on the nonlinear properties. The coefficients investigated include the optical rectification, second and third-harmonic generation and the change in the refractive index. Their dependence on the electric field values, dot size and the energy of the incoming photons is studied extensively. It is shown that the Woods-Saxon potential can be used to model the confinement in quantum dots with considerable success. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：257 / 261

页数：5

共 21 条

[1] Effect of interdiffusion on band structure and intersubband absorption coefficient of GaAs/GaAlAs double quantum well [J].