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

Article

关键词: BOSE-EINSTEIN CONDENSATION;    2-DIMENSIONAL HE-4 FILMS;    LONG-RANGE ORDER;    SEMICONDUCTOR MICROCAVITY;    SUPERFLUID TRANSITION;    QUANTIZED VORTICES;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.90.205430

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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