Signature of the microcavity exciton–polariton relaxation mechanism in the polarization of emitted light
Physical Review B2009Vol. 79(19)
Citations Over TimeTop 11% of 2009 papers
Abstract
We have performed real and momentum space spin-dependent spectroscopies of spontaneously formed exciton polariton condensates for a nonresonant pumping scheme. Under a 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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