Intense laser field effects on the linear and nonlinear optical properties in a semiconductor quantum wire with triangle cross section

被引：57

作者：

Barseghyan, M. G. ^{[1
,2
]}

Duque, C. A. ^{[3
]}

Niculescu, E. C. ^{[4
]}

Radu, A. ^{[4
]}

机构：

[1] Yerevan State Univ, Dept Solid State Phys, Yerevan 0025, Armenia

[2] Yerevan State Univ, Dept Med Phys, Yerevan 0025, Armenia

[3] Univ Antioquia UdeA, Fac Ciencias Exactas & Nat, Inst Fis, Grp Mat Condensada UdeA, Medellin, Colombia

[4] Univ Politehn Bucuresti, Dept Phys, RO-060042 Bucharest, Romania

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2014年 / 66卷

关键词：

Quantum well wire; Intense laser field; Intersubband transitions; Absorption coefficient; Refractive index changes; REFRACTIVE-INDEX CHANGES; DENSITY-OF-STATES; ABSORPTION-COEFFICIENTS; DONOR IMPURITY; HYDROGENIC DONOR; WELL WIRES; TRANSITIONS; ENERGY; GENERATION; SINGLE;

D O I：

10.1016/j.spmi.2013.11.023

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study the laser field effects on the intersubband optical absorption and the refractive index changes in a GaAs/AlGaAs quantum wire with equilateral triangle cross section. The wire is under the action of a laser beam which is assumed to be non-resonant with the semiconductor structure and linearly polarized perpendicularly to the triangle side. In the effective mass approximation and for a finite potential barrier we calculate the subband states by using a finite element method. Linear, non linear and total absorption coefficients and refractive index changes are calculated as functions of the laser field for the allowed intersubband transitions. Two polarizations of the pump radiation, parallel and perpendicular to the laser field direction, are discussed. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：10 / 22

页数：13

共 54 条

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