Spontaneous polarization buildup in a room-temperature polariton laser.

@article{Baumberg2008SpontaneousPB,
  title={Spontaneous polarization buildup in a room-temperature polariton laser.},
  author={J. J. Baumberg and Alexey V. Kavokin and Stavros Christopoulos and Alastair J D Grundy and Rapha{\"e}l Butt{\'e} and Gabriel Christmann and Dmitry D Solnyshkov and Guillaume Malpuech and G Baldassarri H{\"o}ger von H{\"o}gersthal and Eric Feltin and J-F Carlin and Nicolas Grandjean},
  journal={Physical review letters},
  year={2008},
  volume={101 13},
  pages={136409}
}
We observe the buildup of strong (approximately 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… CONTINUE READING

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