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research article
Spontaneous polarization buildup in a room-temperature polariton laser
We observe the buildup of strong (similar to 50%) spontaneous vector polarization in emission from a GaN-based polariton laser excited by short optical pulses at room temperature. The Stokes vector of emitted light changes its orientation randomly from one excitation pulse to another, so that the time-integrated polarization remains zero. This behavior is completely different from any previous laser. We interpret this observation in terms of the spontaneous symmetry breaking in a Bose-Einstein condensate of exciton polaritons.
Type
research article
Web of Science ID
WOS:000259680600054
Publication date
2008
Published in
Volume
101
Issue
13
Article Number
6409
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
October 5, 2010
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