Magnetospectroscopy of a highly excited single $\mathrm{InAs}\text{−}\mathrm{GaAs}$ quantum dot is performed. The multiexcitonic emission related to the $s$, $p$, and $d$ shells of a zero-dimensional system is identified. Orbital Zeeman effects for the $p$ and $d$ energy shells are observed. The overall pattern of the magnetic field evolution of the emission lines resembles a single-particle Fock-Darwin diagram. Effects of interaction between the multiexcitonic configurations and the asymmetry of localizing potential are clearly visible when single-particle states become nearly degenerate: at $B=0$ and at a level crossing induced by the magnetic field.

• Received 25 July 2006

DOI:https://doi.org/10.1103/PhysRevB.74.155301