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

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), pp. 974-976. (doi:10.1126/science.1177980).

Record type: Article


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


Local EPrints ID: 148761
ISSN: 0036-8075
PURE UUID: a0537d6b-281a-4a47-a33a-7d2358bd34d0

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Date deposited: 28 Apr 2010 15:01
Last modified: 18 Jul 2017 19:31

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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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