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Updated: May 11, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Build up of off-diagonal long-range order in microcavity exciton-polaritons across the parametric threshold
1Dept Física Materiales, Universidad Autónoma de Madrid, Madrid 28049, Spain. rita.spano@uam.es
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.
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