Spontaneous Polarisation Build up in a Room Temperature Polariton Laser
Materials Science
2009-11-13 v1
Abstract
We observe the build up of strong (~50%) spontaneous vector polarisation 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 polarisation remains zero. This behaviour is completely different to any previous laser. We interpret this observation in terms of the spontaneous symmetry breaking in a Bose-Einstein condensate of exciton-polaritons.
Keywords
Cite
@article{arxiv.0808.1674,
title = {Spontaneous Polarisation Build up in a Room Temperature Polariton Laser},
author = {J. J. Baumberg and A. V. Kavokin and S. Christopoulos and A. J. D. Grundy and R. Butte and G. Christmann and D. D. Solnyshkov and G. Malpuech and G. Baldassarri Hoger von Hogersthal and E. Feltin and J. -F. Carlin and N. Grandjean},
journal= {arXiv preprint arXiv:0808.1674},
year = {2009}
}