Abstract
We study the initial stage of the decay of a coherent exciton beam created in a semiconductor by an optical pulse. For a sufficiently high exciton density the decay is caused by exciton-exciton interaction. The decay is accompanied by an increasing excitonic luminescence in directions different from the excitation pulse. The luminescence rise time and the exciton population decay rate at the initial stage of relaxation depend dramatically on the configuration of the optical excitation: in the presence of several exciton beams there is a strongly enhanced exciton beam.population decay (and a rise of the luminescence in other directions) as compared to the case of a single exciton beam. Experimental configurations for a test of the proposed scenario are suggested.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call