Theory of exciton-exciton correlation in nonlinear optical response

Details Theory of exciton-exciton correlation in nonlinear optical response Theory of exciton-exciton correlation in nonlinear optical response

1998-07-09

arxiv.org/abs/cond-mat/9807135v1

Physics

Condensed Matter

RevTex, 35 pages, 10 PostScript figs, shorter version submitted to Physical Review B

Scientific paper

10.1103/PhysRevB.58.12920

We present a systematic theory of Coulomb interaction effects in the nonlinear optical processes in semiconductors using a perturbation series in the exciting laser field. The third-order dynamical response consists of phase-space filling correction, mean-field exciton-exciton interaction, and two-exciton correlation effects expressed as a force-force correlation function. The theory provides a unified description of effects of bound and unbound biexcitons, including memory-effects beyond the Markovian approximation. Approximations for the correlation function are presented.

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