Effect of Coulomb interaction on exciton-polariton condensates in GaAs pillar microcavities

A. S. Brichkin*, S. I. Novikov, A. V. Larionov, V. D. Kulakovskii, M. M. Glazov, C. Schneider, Sven Höfling, M. Kamp, A. Forchel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

The effect of Coulomb interaction on exciton-polariton condensates in GaAs pillar microcavities with lateral size of the order of 10 mu m has been investigated by means of a nonresonant excitation with various spot sizes. A local excitation with a small laser spot has been shown to allow for control of the spatial potential of the lower polariton branch in the pillar and manipulation of the polariton condensate wave function, polarization, and energy. Contributions to the blueshift of the condensate mode resulting from interactions within the condensate and from those of condensed polaritons with the photoexcited exciton reservoir have been separated, and the constant of polariton-polariton interaction in the condensate has been evaluated experimentally and compared with the results of the theoretical model.

Original languageEnglish
Article number195301
Number of pages7
JournalPhysical Review. B, Condensed matter and materials physics
Volume84
Issue number19
DOIs
Publication statusPublished - 3 Nov 2011

Keywords

  • BOSE-EINSTEIN CONDENSATION
  • SEMICONDUCTOR MICROCAVITIES
  • CAVITY POLARITONS
  • SPIN RELAXATION
  • SCATTERING
  • DYNAMICS

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