Time-resolved spectroscopy of multi-excitonic decay in an InAs quantum dot
arXiv:cond-mat/0108466 · doi:10.1103/PhysRevB.65.073310
Abstract
The multi-excitonic decay process in a single InAs quantum dot is studied through high-resolution time-resolved spectroscopy. A cascaded emission sequence involving three spectral lines is seen that is described well over a wide range of pump powers by a simple model. The measured biexcitonic decay rate is about 1.5 times the single-exciton decay rate. This ratio suggests the presence of selection rules, as well as a significant effect of the Coulomb interaction on the biexcitonic wavefunction.
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