Two- and three-dimensional magnetoluminescence measurements in a GaAs/AlGaAs multiple quantum well

Abstract

We report a direct means of distinguishing between the two-dimensional and three-dimensional nature of luminescence bands in multilayered structures. Fixed energy interband excitation of a GaAs/AlGaAs multiple quantum well structure reveals oscillations of the luminescence intensity in a varying magnetic field resulting from resonant excitations between the electron and hole Landau levels. An angular dependence of the position of these Shubnikov-de Haas type oscillations shows directly the two-dimensional nature of the origin of a luminescence band.