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

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

doi:10.1103/PhysRevB.90.205430

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

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

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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.

Original language	English
Journal	Physical Review. B, Condensed matter and materials physics
Volume	90
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevB.90.205430
Publication status	Published - 24 Nov 2014

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@article{ac200aa25ed24dbdb871ac20795c8d45,

title = "Algebraic order and the Berezinskii-Kosterlitz-Thouless transition in an exciton-polariton gas",

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.",

author = "W.H. Nitsche and N.Y. Kim and G. Roumpos and C. Schneider and M. Kamp and S. H{\"o}fling and A. Forchel and Y. Yamamoto",

note = "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.",

year = "2014",

month = nov,

day = "24",

doi = "10.1103/PhysRevB.90.205430",

language = "English",

volume = "90",

journal = "Physical Review. B, Condensed matter and materials physics",

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T1 - Algebraic order and the Berezinskii-Kosterlitz-Thouless transition in an exciton-polariton gas

AU - Nitsche, W.H.

AU - Kim, N.Y.

AU - Roumpos, G.

AU - Schneider, C.

AU - Kamp, M.

AU - Höfling, S.

AU - Forchel, A.

AU - Yamamoto, Y.

N1 - 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.

PY - 2014/11/24

Y1 - 2014/11/24

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84915820670

U2 - 10.1103/PhysRevB.90.205430

DO - 10.1103/PhysRevB.90.205430

M3 - Article

AN - SCOPUS:84915820670

SN - 1098-0121

VL - 90

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 20

ER -

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

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