Vortices in polariton OPO superfluids

Details Vortices in polariton OPO superfluids Vortices in polariton OPO superfluids

2011-07-22

arxiv.org/abs/1107.4487v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

40 pages, 16 figures

Scientific paper

This chapter reviews the occurrence of quantised vortices in polariton fluids, primarily when polaritons are driven in the optical parametric oscillator (OPO) regime. We first review the OPO physics, together with both its analytical and numerical modelling, the latter being necessary for the description of finite size systems. Pattern formation is typical in systems driven away from equilibrium. Similarly, we find that uniform OPO solutions can be unstable to the spontaneous formation of quantised vortices. However, metastable vortices can only be injected externally into an otherwise stable symmetric state, and their persistence is due to the OPO superfluid properties. We discuss how the currents charactering an OPO play a crucial role in the occurrence and dynamics of both metastable and spontaneous vortices.

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