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AIP conference proceedings

Temperature effects on the linear and nonlinear optical absorption coefficient in semi-parabolic quantum wells

Asghar Kargar, Alireza Keshavarz

Published Jan 1, 2012• 1 citation
Publisher

Abstract

The effects of temperature on the linear and nonlinear optical absorption coeffic ient in semi-parabolic quantum wells are investigated. By the compact density matrix approach, analytical expressions for these optical properties are obtained. Numerical results are used for typical GaAs/AlxGa1−xAs semi-parabolic nanostructure system. In this paper we have presented the behavior of these optical properties as a function of photon energy and inc ident optical intensity considering the effect of temperature. Our results can make a significant contribution both in practical application and in theoretical research.

DOI
10.1063/1.4757553

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In this paper, we explore the optical properties of AlGaAs/GaAs semi-parabolic quantum well (QW) under different temperature, hydrostatic pressure and applied magnetic field. We calculate the nonlinear optical absorption coefficients and the refractive index changes (RICs) with the compact density-matrix approach and iterative method. Then, within the framework of the effective mass and parabolic-band approximations, the energy eigenvalues and the corresponding wave functions for semi-parabolic QW have been obtained by the finite difference method. The theoretical findings show that (1) the energy spectrum depends strongly on temperature, hydrostatic pressure and applied magnetic field; (2) the linear and third-order nonlinear optical absorption coefficients and the RICs are quite sensitive to temperature, hydrostatic pressure and applied magnetic field. Our study provides a theoretical basis for the fabrication of QW structure.