Adiyatullin, Albert F.Anderson, Mitchell D.Busi, Pierre V.Abbaspour, HadisAndre, RegisPortella-Oberli, Marcia T.Deveaud, Benoit2016-02-162016-02-162016-02-16201510.1063/1.4936889https://infoscience.epfl.ch/handle/20.500.14299/124038WOS:000366311900007Second-order time correlation measurements with a temporal resolution better than 3 ps were performed on a CdTe microcavity where spontaneous Bose-Einstein condensation is observed. After the laser pulse, the nonresonantly excited thermal polariton population relaxes into a coherent polariton condensate. Photon statistics of the light emitted by the microcavity evidences a clear phase transition from the thermal state to a coherent state, which occurs within 3.2 ps after the onset of stimulated scattering. Following this very fast transition, we show that the emission possesses a very high coherence that persists for more than 100 ps after the build-up of the condensate. (C) 2015 AIP Publishing LLC.text::journal::journal article::research article