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Nontrivial phase coupling in polariton multiplets

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.

2160-3308
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.
fefc15e9-ddda-4726-ac1a-3fb18db995d3
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Ohadi, H.
08639b57-7cae-498a-afd2-dbfd5d738cd2
Gregory, R.L.
8a544eeb-87d2-496b-8d26-6ddfe4c10ead
Freegarde, T.
01a5f53b-d406-44fb-a166-d8da9128ea7d
Rubo, Y.G.
11da6e15-93bf-4529-857c-71ecb819d540
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Berloff, N.G.
fefc15e9-ddda-4726-ac1a-3fb18db995d3
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf

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).

Record type: Article

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.

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PhysRevX.6.031032 - Version of Record
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More information

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
ORCID for T. Freegarde: ORCID iD orcid.org/0000-0002-0680-1330

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Date deposited: 26 Jun 2017 16:30
Last modified: 17 Dec 2019 01:48

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