Signature of the microcavity exciton-polariton relaxation mechanism in the polarization of emitted light

Details Signature of the microcavity exciton-polariton relaxation mechanism in the polarization of emitted light Signature of the microcavity exciton-polariton relaxation mechanism in the polarization of emitted light

2008-07-30

arxiv.org/abs/0807.4964v2

Phys. Rev. B 79, 195310 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 7 figures

Scientific paper

10.1103/PhysRevB.79.195310

We have performed real and momentum space spin-dependent spectroscopy of spontaneously formed exciton polariton condensates for a non-resonant pumping scheme. Under linearly polarized pump, our results can be understood in terms of spin-dependent Boltzmann equations in a two-state model. This suggests that relaxation into the ground state occurs after multiple phonon scattering events and only one polariton-polariton scattering. For the circular pumping case, in which only excitons of one spin are injected, a bottleneck effect is observed, implying inefficient relaxation.

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