Signatures of the excitonic memory effects in four-wave mixing processes in cavity polaritons

Details Signatures of the excitonic memory effects in four-wave mixing processes in cavity polaritons Signatures of the excitonic memory effects in four-wave mixing processes in cavity polaritons

2000-03-09

arxiv.org/abs/cond-mat/0003145v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 1 figure

Scientific paper

10.1103/PhysRevB.62.6912

We report the signatures of the exciton correlation effects with finite memory time in frequency domain degenerate four-wave mixing (DFWM) in semiconductor microcavity. By utilizing the polarization selection rules, we discriminate instantaneous, mean field interactions between excitons with the same spins, long-living correlation due to the formation of biexciton state by excitons with opposite spins, and short-memory correlation effects in the continuum of unbound two-exciton states. The DFWM spectra give us the relative contributions of these effects and the upper limit for the time of the exciton-exciton correlation in the unbound two-exciton continuum. The obtained results reveal the basis of the cavity polariton scattering model for the DFWM processes in high-Q GaAs microcavity.

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