title: Build up of off-diagonal long-range order in microcavity exciton-polaritons across the parametric threshold.
abstract: We report an experimental study of the spontaneous spatial and temporal coherence of polariton condensates generated in the optical parametric oscillator configuration, below and at the parametric threshold, and as a function of condensate area. Above the threshold we obtain very long coherence times (up to 3 ns) and a spatial coherence extending over the entire condensate (40 μm). The very long coherence time and its dependence on condensate area and pump power reflect the suppression of polariton-polariton interactions by an effect equivalent to motional narrowing.
authors.affiliation: Dept Física Materiales, Universidad Autónoma de Madrid, Madrid 28049, Spain. rita.spano@uam.es
authors.forename: R
authors.initials: R
authors.lastname: Spano
authors.forename: J
authors.initials: J
authors.lastname: Cuadra
authors.forename: C
authors.initials: C
authors.lastname: Lingg
authors.forename: D
authors.initials: D
authors.lastname: Sanvitto
authors.forename: M D
authors.initials: MD
authors.lastname: Martin
authors.forename: P R
authors.initials: PR
authors.lastname: Eastham
authors.forename: M
authors.initials: M
authors.lastname: van der Poel
authors.forename: J M
authors.initials: JM
authors.lastname: Hvam
authors.forename: L
authors.initials: L
authors.lastname: Viña
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008904:Miniaturization; D009991:Oscillometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*