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Physica E Low-dimensional Systems and Nanostructures

Induced coherent macroscopic states of excitons and biexcitons in a microcavity-embedded Zn1−xCdxSe-type quantum well

A. I. Bobrysheva, S. A. Moskalenko, S. S. Russu

Published Jul 1, 2000• 0 citations
Publisher
DOI
10.1016/s1386-9477(99)00329-x

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A systematic analysis of excitonic and biexcitonic contributions to four-wave mixing in dependence on the polarization state and on the intensity of the exciting beams is presented for ZnSe/Zn1—xMgxSySe1—iiy quantum wells. The relative signals of excitons and biexcitons for different polarization configurations are discussed in terms of a microscopic density matrix model revealing excellent correspondence to the complex experimental data. In configurations which do not allow for a third-order contribution of the biexciton of zero angular momentum higher-order correlations are shown to become important already at densities as low as 1010 excitons cm—2/pulse.