Abstract

A theoretical study of the growth-direction magnetic-field effects on the exciton photoluminescence peak energies in GaAs-Ga1-xAlxAs quantum-dot/ultrathin quantum-well systems is presented. Calculations are performed within the effective-mass approximation and taking into account nonparabolicity effects for both the conduction-band and valence-band effective masses. We use a simple 'QD+ultrathinQW' model heterostructure to mimic the actual physical system, and calculated results for the exciton diamagnetic shifts are found in overall agreement with recent experimental measurements. © IOP Publishing Ltd.