title: Polariton parametric amplifier pump dynamics in the coherent regime.
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.
authors.affiliation: Laboratoire de Physique de la Matière Condensée, Ecole Normale Supérieure, 24, rue Lhomond, F-75005 Paris, France.
authors.forename: A
authors.initials: A
authors.lastname: Huynh
authors.forename: J
authors.initials: J
authors.lastname: Tignon
authors.forename: O
authors.initials: O
authors.lastname: Larsson
authors.forename: Ph
authors.initials: P
authors.lastname: Roussignol
authors.forename: C
authors.initials: C
authors.lastname: Delalande
authors.forename: R
authors.initials: R
authors.lastname: André
authors.forename: R
authors.initials: R
authors.lastname: Romestain
authors.lastname: Le Si Dang