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Observation of half-quantum vortices in an exciton-polariton condensate

Observation of half-quantum vortices in an exciton-polariton condensate
Observation of half-quantum vortices in an exciton-polariton condensate
Singly quantized vortices have already been observed in many systems, including the superfluid helium, Bose-Einstein condensates of dilute atomic gases, and condensates of exciton-polaritons in the solid state. Two-dimensional superfluids carrying spin are expected to demonstrate a different type of elementary excitations referred to as half-quantum vortices, characterized by a {pi} rotation of the phase and a {pi} rotation of the polarization vector when circumventing the vortex core. We detect half-quantum vortices in an exciton-polariton condensate by means of polarization-resolved interferometry, real-space spectroscopy, and phase imaging. Half-quantum vortices coexist with single-quantum vortices in our sample.
0036-8075
974-976
Lagoudakis, K.G.
144a5c8b-d1ef-4259-8d72-5b3b9b927b6b
Ostatnický, T.
5bcc487b-9a23-4ba5-baff-5fdd807ebf2f
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Rubo, Y.G.
11da6e15-93bf-4529-857c-71ecb819d540
André, R.
41752c19-c100-47f8-a27e-9985915648f0
Deveaud-Plédra, B.
063638b5-6c96-4a3a-8938-fe13ace885f4
Lagoudakis, K.G.
144a5c8b-d1ef-4259-8d72-5b3b9b927b6b
Ostatnický, T.
5bcc487b-9a23-4ba5-baff-5fdd807ebf2f
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Rubo, Y.G.
11da6e15-93bf-4529-857c-71ecb819d540
André, R.
41752c19-c100-47f8-a27e-9985915648f0
Deveaud-Plédra, B.
063638b5-6c96-4a3a-8938-fe13ace885f4

Lagoudakis, K.G., Ostatnický, T., Kavokin, A.V., Rubo, Y.G., André, R. and Deveaud-Plédra, B. (2009) Observation of half-quantum vortices in an exciton-polariton condensate. Science, 326 (5955), 974-976. (doi:10.1126/science.1177980).

Record type: Article

Abstract

Singly quantized vortices have already been observed in many systems, including the superfluid helium, Bose-Einstein condensates of dilute atomic gases, and condensates of exciton-polaritons in the solid state. Two-dimensional superfluids carrying spin are expected to demonstrate a different type of elementary excitations referred to as half-quantum vortices, characterized by a {pi} rotation of the phase and a {pi} rotation of the polarization vector when circumventing the vortex core. We detect half-quantum vortices in an exciton-polariton condensate by means of polarization-resolved interferometry, real-space spectroscopy, and phase imaging. Half-quantum vortices coexist with single-quantum vortices in our sample.

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Published date: 13 November 2009
Organisations: Physics & Astronomy

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Local EPrints ID: 148761
URI: http://eprints.soton.ac.uk/id/eprint/148761
ISSN: 0036-8075
PURE UUID: a0537d6b-281a-4a47-a33a-7d2358bd34d0

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Date deposited: 28 Apr 2010 15:01
Last modified: 20 Nov 2021 00:40

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Contributors

Author: K.G. Lagoudakis
Author: T. Ostatnický
Author: A.V. Kavokin
Author: Y.G. Rubo
Author: R. André
Author: B. Deveaud-Plédra

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