Dynamics of long-range ordering in an exciton-polariton condensate.
We report on time-resolved measurements of the first order spatial coherence in an exciton-polariton Bose-Einstein condensate. Long-range spatial coherence is found to set in right at the onset of stimulated scattering, on a picosecond time scale. The coherence reaches its maximum value after the population and decays slowly, staying up to a few hundred picoseconds. This behavior can be qualitatively reproduced, using a stochastic classical field model describing interaction between the polariton condensate and the exciton reservoir within a disordered potential.
Nardin
G
G
IPEQ, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 3, 1015 Lausanne, Switzerland.
Lagoudakis
K G
KG
Wouters
M
M
Richard
M
M
Baas
A
A
André
R
R
Dang
Le Si
le S
Pietka
B
B
Deveaud-Plédran
B
B