Electron-Hole Transitions between States with Nonzero Angular Momenta in the Magnetoluminescence of Quantum Dots

Abstract

Photoluminescence studies on InGaAs/GaAs quantum dots with diameters down to 20 nm have been performed in magnetic fields up to $B=12\mathrm{}$ T and have been compared to detailed calculations. The eigenstates of these cylindrical dots are characterized by a radial quantum number and an azimuthal quantum number corresponding to the orbital angular momentum. From the distinctly different magnetic field dependences of the several transitions we identify electron-hole recombinations involving states with 0, $\pm 1,\mathrm{and}-2\mathrm{}$ values of the angular momentum.