SPLITTING OF ELECTRONIC LEVELS WITH POSITIVE AND NEGATIVE ANGULAR MOMENTA IN IN0.53GA0.47AS INP QUANTUM DOTS BY A MAGNETIC-FIELD/

High excitation magnetoluminescence investigations have been performed on cylindrical In0.53Ga0.47As/InP quantum dots with different diamete rs down to 30 nm. The magnetic held oriented normal to the quantum dis ks enhances the lateral confinement of the carriers inside of the dots , and splits energy levels with positive and negative angular momenta due to the Zeeman-like interaction. This splitting depends linearly on B, and is independent of the disk size. The increase of the lateral q uantization of the carriers by the magnetic field, on the other hand, depends strongly on the dot diameter. The experimental results are in good agreement with the results of detailed numerical calculations.