We use time-resolved photoluminescence spectroscopy to probe the relaxation of excited states in In0.5Al0.04Ga0.40As/Al0.08Ga0.92As self-assembled quantum dots. The relaxation rate of excitons confined to the quantum dots increases by nearly an order of magnitude as the energy of the states approaches the top of the quantum dot potential. This dramatic change in the dynamics of these states reflects the increasing complexity of the states localized near the top of the quantum dots.
|Journal||Physica Status Solidi B|
|Publication status||Published - 2001|