Optical probing of the Coulomb interactions of an electrically pumped polariton condensate
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.
Citation
Klaas , M , Mandal , S , Liew , T C H , Amthor , M , Klembt , S , Worschech , L , Schneider , C & Höfling , S 2017 , ' Optical probing of the Coulomb interactions of an electrically pumped polariton condensate ' Applied Physics Letters , vol 110 , no. 15 , 151103 . DOI: 10.1063/1.4979836
Publication
Applied Physics Letters
Status
Peer reviewed
ISSN
0003-6951Type
Journal article
Rights
© 2017, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1063/1.4979836
Description
The authors would like to thank the State of Bavaria for financial support. SM and TL were supported by the NAP Start-Up grant M4081630 and MOE AcRF Tier 1 grant 2016-T1-001-084.Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.