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Chaos Solitons & Fractals

Chaotic motion of the density operator for an exciton-photon system

R. Tiebel, F.‐J. Schütte, M. Mareyen

Published Mar 1, 1993• 1 citation
Publisher
DOI
10.1016/0960-0779(93)90063-7

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Summary form only given. The light emission of optically excited quantum well excitons can be divided into two parts: the nonscattered contribution (primary emission, where the momentum of the photon is conserved) and the scattered one (secondary emission). Recent theoretical work was focused on isolated mechanisms for the generation of secondary emission, such as exciton-disorder (Rayleigh signal), exciton-phonon and exciton-photon interactions. In extension of these studies, we treat a more general situation by studying the simultaneous action of several emission generating mechanisms for the ease of 1s-exciton excitation in the low density case. The theoretical approach is based on a coupled set of Heisenberg equations of motion for quantum correlation functions of excitons, photons, phonons and their assisted density matrices in a disordered system using 2nd order Born and Markovian approximation. First, we illustrate the procedure and numerical results for a coupled system of excitons, phonons and photons in an ordered quantum well.