Linear and nonlinear optical properties in a GaAs quantum dot with disclination under magnetic field and Aharonov-Bohm flux field

Abstract

In this paper, linear and nonlinear optical properties of a GaAs quantum dot (QD) confined by a parabolic plus inverse square (PIS) potential with a disclination are theoretically studied under the influence of a magnetic field and the Aharonov-Bohm (AB) flux field. To achieve this, the Schrödinger equation for this system is derived, and its solutions of the wave function and the energy levels are obtained using the confluent hypergeometric equation. The effect of the disclination defect on the optical absorption coefficients (OACs) and refractive index changes (RICs) of the PIS quantum dot is examined in detail. The results obtained indicate that the peak positions and amplitudes of the OACs and RICs are significantly affected by changes in the magnitude of the disclination parameter. Furthermore, the effect of the disclination on the peak positions of the OACs and the RICs can be eliminated by adjusting the magnetic field strength.