Electronic states and nonlinear optical properties of a two-dimensional hexagonal quantum dot: Effects of impurity, geometrical size and confinement potential

被引：9

作者：

Rezaei, G. ^{[1
]}

Azami, S. M. ^{[2
]}

Vaseghi, B. ^{[1
]}

机构：

[1] Univ Yasuj, Coll Sci, Dept Phys, Yasuj 75914353, Iran

[2] Univ Yasuj, Dept Chem, Coll Sci, Yasuj 75914353, Iran

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2012年 / 249卷 / 07期

关键词：

electronic states; hydrogen; impurities; optical absorption; quantum dots; refractive index; ABSORPTION-COEFFICIENTS; 2ND-HARMONIC GENERATION; 3RD-HARMONIC GENERATION; HYDROGENIC IMPURITY; MAGNETIC-FIELDS; BINDING-ENERGY; DONOR;

D O I：

10.1002/pssb.201147445

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In the present work, the linear and the third-order nonlinear optical absorption coefficients as well as refractive-index changes in a two-dimensional hexagonal quantum dot with the presence of an impurity are calculated. A matrix diagonalization method is used to calculate energy levels and corresponding wave functions in the effective-mass approximation. Also, by means of the compact-density matrix approach the linear and nonlinear optical absorption coefficients and refractive-index changes are calculated. The effects of the impurity, the size of the dot and the confinement potential on energy eigenvalues, optical absorption coefficients and refractive-index changes are investigated. It is found that the energy eigenvalues, absorption coefficients and refractive-index changes are strongly dependent on the dot size, the confinement potential and the effects produced by the impurity.

引用

页码：1459 / 1464

页数：6

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