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

I. A. Shelykh, L. Viña*, A. V. Kavokin, N. G. Galkin, G. Malpuech, R. André

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalSolid State Communications
Issue number1-2
Publication statusPublished - Jul 2005

Bibliographical note

Funding Information:
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.

Other keywords

  • A. Microcavities
  • D. Bottleneck
  • D. Coherence
  • D. Dark excitons
  • D. Polaritons
  • D. Quantum beats
  • E. Time-resolved spectroscopy


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