Influence of interactions with noncondensed particles on the coherence of a one-dimensional polariton condensate

Johannes Schmutzler*, Tomasz Kazimierczuk, Oemer Bayraktar, Marc Assmann, Manfred Bayer, Sebastian Brodbeck, Martin Kamp, Christian Schneider, Sven Höfling

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

One-dimensional polariton condensates (PoCos) in a photonic wire are generated through nonresonant laser excitation, by which also a reservoir of background carriers is created. Interaction with this reservoir may affect the coherence of the PoCo, which is studied here by injecting a condensate locally and monitoring the coherence along the wire. While the incoherent reservoir is mostly present within the excitation laser spot, the condensate can propagate ballistically through the wire. Photon correlation measurements show that far from the laser spot the second-order correlation function approaches unity value, as expected for the coherent condensed state. When approaching the spot, however, the correlation function increases up to values of 1.2 showing the addition of noise to the emission due to interaction with the reservoir. This finding is substantiated by measuring the first-order coherence by a double-slit experiment, which shows a reduced visibility of interference at the excitation laser spot.

Original languageEnglish
Article number115119
Number of pages7
JournalPhysical Review. B, Condensed matter and materials physics
Volume89
Issue number11
DOIs
Publication statusPublished - 19 Mar 2014

Keywords

  • Bose-Einstein Condensation
  • Exciton Polaritons
  • Microcavity
  • Laser

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