Influence of quantum dot shape on energy spectra of three-dimensional quantum dots superlattices

Abstract

The superlattices of quantum dots InAs in a matrix GaAs has been studied in this work. The superlattices of spherical and cubic quantum dots (QD) has been studied. Using the method of plane waves for different shapes of QT, analytical expressions for calculating the energy spectrum has been obtained. The dependences of energy zones at high symmetry dots has been constructed. Dependences of widths of zones has been found. It effects on the optical properties and, accordingly, the absorption and radiation coefficients. It has been shown that the largest bandwidth is for QD with the smallest symmetry (cubic quantum dots).