Investigating the optical properties of cylindrical core/shell/shell quantum dots (CCSSQDs) with and without hydrogenic impurity: Role of spatial factors, magnetic field, dielectric matrices and Rashba parameter

Abstract

Through this theoretical investigation, we highlight the precise role of various internal (core radius, height and first shell thickness) and external factors (impurity, magnetic field, dielectric environment and Rashba spin orbit interaction) on AlGaAs/GaAs/AlGaAs CCSSQD and their influence on the linear and nonlinear properties. The binding energy of a donor impurity under the influence of an applied magnetic field is computed using a variational method employing a three-parameter trial wave function and the effective mass approximation. The major outcomes of our quantitative research demonstrate a strong dependence between the core radius and first shell thickness with respect to the binding energy. Magnetic field, dielectric environment and Rashba parameter change drastically the impurity state and then modifies the optical characteristics in terms of intensity and peaks locations. By appropriately manipulating internal and external variables we can not only regulate the properties of the donor impurity but also guide developers in the creation of novel optoelectronic devices.