Many-Body and Correlation Effects on Parametric Polariton Amplification in Semiconductor Microcavities | Zendy

Salvatore Savasta | Zendy; Omar Di Stefano | Zendy; R. Girlanda | Zendy

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Many-Body and Correlation Effects on Parametric Polariton Amplification in Semiconductor Microcavities

Author(s) -

Salvatore Savasta,

Omar Di Stefano,

R. Girlanda

Publication year - 2003

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.90.096403

Subject(s) - exciton , physics , polariton , semiconductor , scattering , electron , quantum decoherence , biexciton , coulomb , photon , realization (probability) , coupling (piping) , condensed matter physics , atomic physics , quantum mechanics , quantum , materials science , statistics , mathematics , metallurgy

The complexity induced by the Coulomb interaction between electrons determines the noninstantaneous character of exciton-exciton collisions. We show that the exciton-photon coupling in semiconductor microcavities is able to alter the exciton dynamics during collisions strongly affecting the effective scattering rates. Our analysis clarifies the origin of the great enhancement of parametric gain observed when increasing the polariton splitting. It also demonstrates that exciton-exciton collisions in semiconductors can be controlled and engineered to produce almost decoherence-free collisions for the realization of all-optical microscopic devices.

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