Algebraic order and the Berezinskii-Kosterlitz-Thouless transition in an exciton-polariton gas

Nitsche, W.H.; Kim, N.Y.; Roumpos, G.; Schneider, C.; Kamp, M.; Höfling, S.; Forchel, A.; Yamamoto, Y.

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Date

24/11/2014

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Abstract

We observe quasi-long-range coherence in a two-dimensional condensate of exciton-polaritons. Our measurements confirm that the spatial correlation algebraically decays with a slow power law, whose exponent quantitatively behaves as predicted by the Berezinskii-Kosterlitz-Thouless theory. The exciton-polaritons are created by nonresonant optical pumping of a microcavity sample with embedded GaAs quantum wells at liquid helium temperature. Michelson interference is used to measure the coherence of the photons emitted by decaying exciton-polaritons.

Citation

Nitsche , W H , Kim , N Y , Roumpos , G , Schneider , C , Kamp , M , Höfling , S , Forchel , A & Yamamoto , Y 2014 , ' Algebraic order and the Berezinskii-Kosterlitz-Thouless transition in an exciton-polariton gas ' , Physical Review. B, Condensed matter and materials physics , vol. 90 , no. 20 . https://doi.org/10.1103/PhysRevB.90.205430

Publication

Physical Review. B, Condensed matter and materials physics

Status

Peer reviewed

DOI

https://doi.org/10.1103/PhysRevB.90.205430

ISSN

1098-0121

Type

Journal article

Rights

Published by the American Physical Society. This article is available under the terms of the Creative Commons Attribution 3.0 License (http://creativecommons.org/licenses/by/3.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Description

This research has been supported by the Japan Society for the Promotion of Science (JSPS) through its Funding Program for World-Leading Innovative Research and Development on Science and Technology (FIRST Program), by the U.S. Navy/SPAWAR Grant No. N66001-09-1-2024, and by the National Science Foundation Grant No. ECCS-09 25549. W.H.N. acknowledges the Gerhard Casper Stanford Graduate Fellowship.

Collections

University of St Andrews Research

URI

http://hdl.handle.net/10023/5945