Abstract
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.
Original language | English |
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Article number | 256402 |
Number of pages | 4 |
Journal | Phys. Rev. Lett. |
Volume | 103 |
Issue number | 25 |
DOIs | |
Publication status | Published - 15 Dec 2009 |
Keywords
- spatial coherence
- long-range ordering
- exciton polariton condensates