Spatial coherence properties of one dimensional exciton-polariton condensates
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In this work, we combine a systematic experimental investigation of the power- and temperature-dependent evolution of the spatial coherence function, g(1)(r), in a one dimensional exciton-polariton channel with a modern microscopic numerical theory based on a stochastic master equation approach. The spatial coherence function g(1)(r) is extracted via high-precision Michelson interferometry, which allows us to demonstrate that in the regime of nonresonant excitation, the dependence g(1)(r) reaches a saturation value with a plateau, which is determined by the intensity of the pump and effective temperature of the crystal lattice. The theory, which was extended to allow for treating incoherent excitation in a stochastic frame, matches the experimental data with good qualitative and quantitative agreement. This allows us to verify the prediction that the decay of the off-diagonal long-range order can be almost fully suppressed in one dimensional condensate systems.
Fischer , J , Savenko , I G , Fraser , M D , Holzinger , S , Brodbeck , S , Kamp , M , Shelykh , I A , Schneider , C & Höfling , S 2014 , ' Spatial coherence properties of one dimensional exciton-polariton condensates ' Physical Review Letters , vol. 113 , no. 20 . DOI: 10.1103/PhysRevLett.113.203902
Physical Review Letters
© 2014 American Physical Society
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