Second-order time correlations within a polariton Bose-Einstein condensate in a CdTe microcavity.
Second-order time correlations of polaritons have been measured across the condensation threshold in a CdTe microcavity. The onset of Bose-Einstein condensation is marked by the disappearance of photon bunching, demonstrating the transition from a thermal-like state to a coherent state. Coherence is, however, degraded with increasing polariton density, most probably as a result of self-interaction within the condensate and scatterings with noncondensed excitons and polaritons. Such behavior clearly differentiates polariton Bose condensation from photon lasing.
Kasprzak
J
J
Institut Néel, CNRS/UJF, 25 avenue des Martyrs, BP 166 38042 Grenoble cedex 9, France.
Richard
M
M
Baas
A
A
Deveaud
B
B
André
R
R
Poizat
J-Ph
JP
Dang
Le Si
le S