title: Dominant effect of polariton-polariton interactions on the coherence of the microcavity optical parametric oscillator.
abstract: The importance of interaction effects in determining the temporal coherence of spectrally and spatially isolated single modes of the microcavity optical parametric oscillator (OPO) is demonstrated. As a function of macroscopic occupancy, the coherence time (tau c) first increases linearly and then exhibits saturation behavior, reaching maximum values of up to 500 ps. Good agreement is found with a model including fluctuations in polariton number and polariton-polariton interactions between the OPO states. tau c is a property of the coupled OPO system, a result confirmed by the finding of equal coherence times for signal and idler, even though the idler is subject to strong additional scattering.
authors.affiliation: Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom.
authors.forename: D N
authors.initials: DN
authors.lastname: Krizhanovskii
authors.forename: D
authors.initials: D
authors.lastname: Sanvitto
authors.forename: A P D
authors.initials: AP
authors.lastname: Love
authors.forename: M S
authors.initials: MS
authors.lastname: Skolnick
authors.forename: D M
authors.initials: DM
authors.lastname: Whittaker
authors.forename: J S
authors.initials: JS
authors.lastname: Roberts