Abstract
We study by time-resolved luminescence, the radiative recombination from a single quantum well placed inside a graded confinement structure. We are able to produce a cold (T<50 K), high-density (5×1011<N<5×1012 cm−2) plasma. We compare our spectra with usual lineshape fitting procedures and give evidence for the shortcomings of such an analysis. We detail the consequences of the present work for the determination of band-gap renormalization, the conservation of k-selection rule, and the measurement of the radiative recombination rate.
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