Title: Effects of magnetic field and hydrostatic pressure on a confined exciton in a strained GaAs_0.9P_0.1/GaAs_0.6P_0.4 quantum dot

Authors: Ada Vinolin; A. John Peter

Addresses: Department of Physics, Madurai Kamaraj University College, Alagar Kovil Main Rd,Madurai-625 002, Tamil Nadu, India ' Department of Physics, Government Arts College, Melur-625 109. Madurai, Tamil Nadu, India

Abstract: Simultaneous effects of magnetic field and the hydrostatic pressure on the confined exciton in a cylindrical GaAs_0.9P_0.1/GaAs_0.6P_0.4 strained quantum dot are investigated taking into account the geometrical confinement effect. Calculations are done using variational formulism within the single band effective mass approximation numerically. The oscillator strength as a function of dot radius is computed in the influence of magnetic field strength and pressure effect. Second order nonlinear coefficient, second order harmonic generation and the third-order nonlinear optical susceptibility of third order harmonic generation as a function of dot radius, are carried out in the presence of magnetic field strength and the hydrostatic pressure. Our results show that the optical properties strongly depend on the spatial confinement, the hydrostatic pressure and magnetic field strength.

Keywords: quantum dots; GaAs; gallium arsenide; optical properties; magnetic field; hydrostatic pressure; confined exciton; nonlinear coefficient; harmonic generation; spatial confinement; nanotechnology.

DOI: 10.1504/IJNP.2014.067605

International Journal of Nanoparticles, 2014 Vol.7 No.3/4, pp.316 - 330

Received: 16 May 2014
Accepted: 25 Jul 2014
Published online: 28 Feb 2015 *

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