ABSORPTION SPECTRUM OF AN EXCITON IN AN In_xGa_{1 - x}As/GaAs QUANTUM DOT IN THE PRESENCE OF A MAGNETIC FIELD

Abstract

We calculate the absorption spectrum of a single exciton, confined in an InxGa1−xAs/GaAs disk-shaped quantum dot, as a function of the strength of an applied magnetic field. Exciton eigenstates are obtained by numerical diagonalization of the Hamiltonian, within the effective mass approximation. A correction in the expression of the Coulomb interaction matrix elements is verified.