Polariton parametric amplifier pump dynamics in the coherent regime |
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| Authors: | Huynh A Tignon J Larsson O Roussignol Ph Delalande C André R Romestain R Le Si Dang |
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| Affiliation: | Laboratoire de Physique de la Matière Condensée, Ecole Normale Supérieure, 24, rue Lhomond, F-75005 Paris, France. |
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| Abstract: | We studied the pump coherent dynamics in a II-VI microcavity parametric amplifier, using angle-resolved four-wave mixing. The polariton parametric amplification is found to result in a strong quenching and saturation of the pump coherence lifetime above the threshold. For the polariton scattering processes that remain below the amplification threshold, we find an angle-dependent collision broadening associated with the efficiency of the polariton scattering towards the excitonic reservoir. |
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