Optical probing of the Coulomb interactions of an electrically pumped polariton condensate

M. Klaas, S. Mandal, T. C. H. Liew, M. Amthor, S. Klembt, L Worschech, C. Schneider, Sven Höfling

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We report on optical probing of the Coulomb interactions in an electrically driven exciton-polariton laser. By positioning a weak non-resonant Gaussian continuous wave-beam with a diameter of 2 μm inside an electrical condensate excited in a 20 μm diameter micropillar, we study a repulsion effect which is characteristic of the part-excitonic nature of the microcavity system in strong coupling. It manifests itself in a modified real space distribution of the emission pattern. Furthermore, polariton repulsion results in a continuous blueshift of the emission with increased power of the probe beam. A Gross-Pitaevskii equation approach based on modeling the electrical and optical potentials explains our experimental data.
Original languageEnglish
Article number151103
JournalApplied Physics Letters
Volume110
Issue number15
DOIs
Publication statusPublished - 10 Apr 2017

Keywords

  • Polaritons
  • Exciton mediated interactions
  • Ground states
  • Blue shift
  • Condensation

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