Crossover from exciton to biexciton polaritons in semiconductor microcavities

Pump-probe measurements in a microcavity containing a quantum well show that a population of circularly polarized ( sigma(+)) excitons can completely inhibit the transition to sigma(-) one-exciton states by transferring the oscillator strength to the biexcitonic resonance. With increasing pump inten...

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Published inPhysical review letters Vol. 85; no. 2; p. 385
Main Authors Saba, M, Quochi, F, Ciuti, C, Oesterle, U, Staehli, JL, Deveaud, B, Bongiovanni, G, Mura, A
Format Journal Article
LanguageEnglish
Published United States 10.07.2000
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Summary:Pump-probe measurements in a microcavity containing a quantum well show that a population of circularly polarized ( sigma(+)) excitons can completely inhibit the transition to sigma(-) one-exciton states by transferring the oscillator strength to the biexcitonic resonance. With increasing pump intensity the linear exciton-polariton doublet evolves into a triplet polariton structure and finally into a shifted biexciton-polariton doublet. A theoretical model of interacting excitons demonstrates that the crossover from exciton to biexciton polaritons is driven by three-exciton Coulomb correlation.
ISSN:1079-7114
DOI:10.1103/physrevlett.85.385