Condensation of Semiconductor Microcavity Exciton Polaritons
Abstract
A phase transition from a classical thermal mixed state to a quantum-mechanical pure state of exciton polaritons is observed in a GaAs multiple quantum-well microcavity from the decrease of the second-order coherence function. Supporting evidence is obtained from the observation of a nonlinear threshold behavior in the pump-intensity dependence of the emission, a polariton-like dispersion relation above threshold, and a decrease of the relaxation time into the lower polariton state. The condensation of microcavity exciton polaritons is confirmed.
- Publication:
-
Science
- Pub Date:
- October 2002
- DOI:
- 10.1126/science.1074464
- Bibcode:
- 2002Sci...298..199D
- Keywords:
-
- PHYSICS