Condensation of Semiconductor Microcavity Exciton Polaritons
Hui Deng,1*
Gregor Weihs,12
Charles Santori,1
Jacqueline Bloch,3
Yoshihisa Yamamoto14
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.
1 Quantum Entanglement Project, ICORP, JST,
Edward L. Ginzton Laboratory, Stanford University, Stanford, CA 94305, USA.
2 Institut für Experimentalphysik,
Universität Wien, Vienna, Austria.
3 LPN/CNRS,
Route de Nozay, 91460, Marcoussis, France.
4 NTT Basic Research Laboratories,
Astugishi, Kanagawa, Japan.
*
To whom correspondence should be addressed. E-mail:
dhui{at}stanford.edu
