Optical spectroscopy of a single Al0.36In0.64As/Al0.33Ga0.67As quantum dot- art. no. 075314

We report results of interband spectroscopy of a single Al0.36In0.64As/Al0. 33Ga0.67As self-assembled quantum dot. The single dot spectroscopy has been carried out at low temperature as a function of the excitation power and m agnetic field up to 8 T. The emission spectra as a function of excitation p ower show two distinct groups of transitions that we associate with the rec ombination from ground and excited quantum dot levels with a spacing of sim ilar to 70 meV. The application of magnetic field allows us to identify the exciton emission as well as the emission from the biexciton, and charged e xciton complexes with binding energies of similar to5 meV. The binding ener gies compare favorably with results of calculations.