Non-linear coupling of polariton and dark exciton states in semiconductor microcavities

doi:10.1016/j.ssc.2005.04.012

Solid State Communications

Volume 135, Issues 1–2, July 2005, Pages 1-6

https://doi.org/10.1016/j.ssc.2005.04.012 Get rights and content

Abstract

We report a new mechanism of non-linear coupling of optically active and dark crystal states. We observe experimentally pronounced beats of the intensity of photoluminescence from a bottleneck region of the exciton-polariton band in a microcavity in the strong coupling regime and at strong pumping. These beats are extremely sensitive to the pumping intensity and vanish for weak pumping. We show theoretically that coherent polariton–polariton scattering which leads to the mixing between bright and dark exciton states can be responsible for this effect.

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Acknowledgements

This work has been partially supported by the Spanish MCYT (MAT2002-00139), the CAM (GR/MAT/0099/2004) and the ‘Marie–Curie’ MRTN-CT-2003-503677 ‘Clermont2’ (‘Physics of Microcavities’). A.K. and G.M. acknowledge the support of the European Research Office of the US Army, contract number N62558-03-M0803.

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Non-linear coupling of polariton and dark exciton states in semiconductor microcavities

Abstract

Section snippets

Acknowledgements

Phys. Rev. Lett.

Phys. Rev.

Cavity Polaritons

Phys. Rev. Lett.

Science

Phys. Rev. B