Abstract
We report on time-resolved photoluminescence measurements performed on a series of single GaAs/GaAlAs quantum dot structures with various lateral confinement. For all investigated quantum dots, even at very low excitation density the first steps of the relaxation process appear dominated by Coulomb scattering. In contrast, different recombination dynamics are observed for boxes according to their lateral confining potentials. By increasing the excitation power a particular feature occurs for the box with maximum lateral confinement: a successive filling of its discrete states occurs and is interpreted as a consequence of the Pauli exclusion principle.
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