Parallel dark soliton pair in a bistable 2D exciton-polariton superfluid
- URL: http://arxiv.org/abs/2003.11408v1
- Date: Wed, 25 Mar 2020 13:52:22 GMT
- Title: Parallel dark soliton pair in a bistable 2D exciton-polariton superfluid
- Authors: Giovanni Lerario, Sergei V. Koniakhin, Anne Ma\^itre, Dmitry
Solnyshkov, Alessandro Zilio, Quentin Glorieux, Guillaume Malpuech, Elisabeth
Giacobino, Simon Pigeon, Alberto Bramati
- Abstract summary: 2D dark solitons are unstable and collapse into vortices due to snake instabilities.
We demonstrate that a pair of dark solitons can be formed in the wake of an obstacle in a polariton flow resonantly supported by a homogeneous laser beam.
- Score: 47.187609203210705
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Collective excitations, such as vortex-antivortex and dark solitons, are
among the most fascinating effects of macroscopic quantum states. However, 2D
dark solitons are unstable and collapse into vortices due to snake
instabilities. Making use of the optical bistability in exciton-polariton
microcavities, we demonstrate that a pair of dark solitons can be formed in the
wake of an obstacle in a polariton flow resonantly supported by a homogeneous
laser beam. Unlike the purely dissipative case where the solitons are grey and
spatially separate, here the two solitons are fully dark, rapidly align at a
specific separation distance and propagate parallel as long as the flow is in
the bistable regime. Remarkably, the use of this regime allows to avoid the
phase fixing arising in resonant pumping regime and to circumvent the polariton
decay. Our work opens very wide perspectives of studying new classes of
phase-density defects which can form in driven-dissipative quantum fluids of
light.
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