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arXiv · 1309.7171

Effect of Interactions on Vortices in a Non-equilibrium Polariton Condensate

D. N. Krizhanovskii·D. M. Whittaker·R. A. Bradley·K. Guda·D. Sarkar·D. Sanvitto·L. Vina·E. Cerda·P. Santos·K. Biermann·R. Hey·M. S. Skolnick
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Abstract

We demonstrate the creation of vortices in a macroscopically occupied polariton state formed in a semiconductor microcavity. A weak external laser beam carrying orbital angular momentum (OAM) is used to imprint a vortex on the condensate arising from the polariton optical parametric oscillator (OPO). The vortex core radius is found to decrease with increasing pump power, and is determined by polariton-polariton interactions. As a result of OAM conservation in the parametric scattering process, the excitation consists of a vortex in the signal and a corresponding anti-vortex in the idler of the OPO. The experimental results are in good agreement with a theoretical model of a vortex in the polariton OPO.

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D. N. Krizhanovskii, D. M. Whittaker, R. A. Bradley, K. Guda, D. Sarkar, D. Sanvitto, L. Vina, E. Cerda, P. Santos, K. Biermann, R. Hey, M. S. Skolnick. 2013-09-27. Effect of Interactions on Vortices in a Non-equilibrium Polariton Condensate. https://doi.org/10.1103/physrevlett.104.126402

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