Theoretical Investigation of Different Types of Trion States in GaAs Ellipsoidal Quantum Dot

Abstract

Using the variational method, various types of mixed two-dimensional coupled negative and positive trions in a GaAs strongly oblate ellipsoidal quantum dot in the intermediate quantization mode were investigated. The trial wave function for the positive and negative trions is constructed on the basis of a single-particle wave function obtained in the framework of the adiabatic approximation. The dependences of the binding energy of the trion states and of the recombination of all types of trions on the geometric parameters of an ellipsoidal quantum dot are obtained. The radiative lifetime of various types of positive and negative trions is estimated for the intermediate quantization mode.