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arXiv · 1901.05608

Observation of Non-equilibrium Motion and Equilibration in Polariton Rings

S. Mukherjee·D. M. Myers·R. G. Lena·B. Ozden·J. Beaumariage·Z. Sun·M. Steger·L. N. Pfeiffer·K. West·A. J. Daley·D. W. Snoke
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Abstract

We present a study of the macroscopic dynamics of a polariton condensate formed by non-resonant optical excitation in a quasi-one-dimensional ring-shaped microcavity. The presence of a gradient in the cavity photon energy creates a macroscopic trap for the polaritons in which a single mode condensate is formed. With time- and energy-resolved imaging we show the role of interactions in the motion of the condensate as it undergoes equilibration in the ring. These experiments also give a direct measurement of the polariton-polariton interaction strength above the condensation threshold. Our observations are compared to the open-dissipative one-dimensional Gross-Pitaevskii equation which shows excellent qualitative agreement.

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S. Mukherjee, D. M. Myers, R. G. Lena, B. Ozden, J. Beaumariage, Z. Sun, M. Steger, L. N. Pfeiffer, K. West, A. J. Daley, D. W. Snoke. 2019-01-17. Observation of Non-equilibrium Motion and Equilibration in Polariton Rings. https://doi.org/10.1103/physrevb.100.245304

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