Hamp, JO;
Balin, AK;
Marchetti, FM;
Sanvitto, D;
Szymanska, MH;
(2015)
Spontaneous rotating vortex rings in a parametrically driven polariton fluid.
EPL (Europhysics Letters)
, 110
(5)
, Article 57006. 10.1209/0295-5075/110/57006.
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Abstract
We present the theoretical prediction of spontaneous rotating vortex rings in a parametrically driven quantum fluid of polaritons – coherent superpositions of coupled quantum well excitons and microcavity photons. These rings arise not only in the absence of any rotating drive, but also in the absence of a trapping potential, in a model known to map quantitatively to experiments. We begin by proposing a novel parametric pumping scheme for polaritons, with circular symmetry and radial currents, and characterize the resulting nonequilibrium condensate. We show that the system is unstable to spontaneous breaking of circular symmetry via a modulational instability, following which a vortex ring with large net angular momentum emerges, rotating in one of two topologically distinct states. Such rings are robust and carry distinctive experimental signatures, and so they could find applications in the new generation of polaritonic devices.
| Type: | Article |
|---|---|
| Title: | Spontaneous rotating vortex rings in a parametrically driven polariton fluid |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1209/0295-5075/110/57006 |
| Publisher version: | https://doi.org/10.1209/0295-5075/110/57006 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10095390 |
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