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Analysis of the exciton-exciton interaction in semiconductor quantum wells

2008; American Physical Society; Volume: 78; Issue: 4 Linguagem: Inglês

10.1103/physrevb.78.045313

1550-235X

Christoph Schindler, R. Zimmermann,

Strong Light-Matter Interactions

The exciton-exciton interaction is investigated for quasi-two-dimensional quantum structures. A bosonization scheme is applied including the full spin structure. For generating the effective interaction potentials, the Hartree-Fock and Heitler-London approaches are improved by a full two-exciton calculation which includes the van der Waals effect. With these potentials the biexciton formation in bilayer systems is investigated. For coupled quantum wells the two-body scattering matrix is calculated and employed to give a modified relation between exciton density and blueshift. Such a relation is of central importance for gauging exciton densities in experiments which pave the way toward Bose-Einstein condensation of excitons.