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


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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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1126/science.1177980
ISSNs: 0036-8075 (print)
1095-9203 (electronic)
Related URLs:
Subjects: Q Science > QC Physics
Divisions : University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 148761
Accepted Date and Publication Date:
13 November 2009Published
Date Deposited: 28 Apr 2010 15:01
Last Modified: 31 Mar 2016 13:22
URI: http://eprints.soton.ac.uk/id/eprint/148761

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