Nontrivial phase coupling in polariton multiplets
Nontrivial phase coupling in polariton multiplets
We investigate the phase coupling between spatially separated polariton condensates under nonresonant optical pulsed excitation. In the simple case of two condensates, we observe phase locking either in symmetric or antisymmetric states. We demonstrate that the coupling symmetry depends both on the separation distance and outflow velocity from the condensates. We interpret the observations through stimulated relaxation of polaritons to the phase configuration with the highest occupation. We derive an analytic criterion for the phase locking of a pair-polariton condensate and extend it to polariton multiplets. In the case of three condensates, we predict theoretically and observe experimentally either in-phase locking or the appearance of phase winding with phase differences of ±2π/3 between neighbors. The latter state corresponds to a vortex of winding number ±1 across the three polariton condensates.
Ohadi, H.
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Gregory, R.L.
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Freegarde, T.
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Rubo, Y.G.
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Kavokin, A.V.
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Berloff, N.G.
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Lagoudakis, P.G.
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26 August 2016
Ohadi, H.
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Gregory, R.L.
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Freegarde, T.
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Rubo, Y.G.
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Kavokin, A.V.
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Berloff, N.G.
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Lagoudakis, P.G.
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Ohadi, H., Gregory, R.L., Freegarde, T., Rubo, Y.G., Kavokin, A.V., Berloff, N.G. and Lagoudakis, P.G.
(2016)
Nontrivial phase coupling in polariton multiplets.
Physical Review X, 6 (3), [031032].
(doi:10.1103/PhysRevX.6.031032).
Abstract
We investigate the phase coupling between spatially separated polariton condensates under nonresonant optical pulsed excitation. In the simple case of two condensates, we observe phase locking either in symmetric or antisymmetric states. We demonstrate that the coupling symmetry depends both on the separation distance and outflow velocity from the condensates. We interpret the observations through stimulated relaxation of polaritons to the phase configuration with the highest occupation. We derive an analytic criterion for the phase locking of a pair-polariton condensate and extend it to polariton multiplets. In the case of three condensates, we predict theoretically and observe experimentally either in-phase locking or the appearance of phase winding with phase differences of ±2π/3 between neighbors. The latter state corresponds to a vortex of winding number ±1 across the three polariton condensates.
Text
PhysRevX.6.031032
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Accepted/In Press date: 17 April 2016
e-pub ahead of print date: 26 August 2016
Published date: 26 August 2016
Organisations:
Physics & Astronomy, Quantum, Light & Matter Group
Identifiers
Local EPrints ID: 411790
URI: http://eprints.soton.ac.uk/id/eprint/411790
ISSN: 2160-3308
PURE UUID: b82e6a4c-0cfc-43b9-a71b-42388b82ca5c
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Date deposited: 26 Jun 2017 16:30
Last modified: 06 Jun 2024 01:41
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Author:
H. Ohadi
Author:
R.L. Gregory
Author:
Y.G. Rubo
Author:
N.G. Berloff
Author:
P.G. Lagoudakis
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