Distribution of Oscillator Strengths for Recombination of Localised Excitons in Two Dimensions
Michael Wilkinson, Paul N. Walker, Kaumba Chinyama
Abstract
We investigate the distribution of oscillator strengths for the recombination of excitons in a two dimensional sample, trapped in local minima of the confinement potential: the results are derived from a statistical topographic model of the potential. The predicted distribution of oscillator strengths is very different from the Porter-Thomas disribution which usually characterises disordered systems, and is notable for the fact that small oscillator strengths are extremely rare.
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