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

K. G. Lagoudakis, T. Ostatnický, A. V. Kavokin, Y. G. Rubo, R. André, B. Deveaud-Plédran

Research output: Contribution to journalArticle

204 Citations (Scopus)

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 π rotation of the phase and a π 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.
LanguageEnglish
Pages974 -976
Number of pages3
JournalScience
Volume326
Issue number5955
DOIs
Publication statusPublished - 13 Nov 2009

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polaritons
condensates
excitons
vortices
monatomic gases
polarization
elementary excitations
Bose-Einstein condensates
interferometry
helium
solid state
spectroscopy

Keywords

  • half-quantum vortices
  • exciton polariton condensates
  • polarization
  • spectroscopy

Cite this

Lagoudakis, K. G., Ostatnický, T., Kavokin, A. V., Rubo, Y. G., André, R., & Deveaud-Plédran, B. (2009). Observation of half-quantum vortices in an exciton-polariton condensate. Science, 326(5955), 974 -976. https://doi.org/10.1126/science.1177980
Lagoudakis, K. G. ; Ostatnický, T. ; Kavokin, A. V. ; Rubo, Y. G. ; André, R. ; Deveaud-Plédran, B. / Observation of half-quantum vortices in an exciton-polariton condensate. In: Science. 2009 ; Vol. 326, No. 5955. pp. 974 -976.
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Lagoudakis, KG, Ostatnický, T, Kavokin, AV, Rubo, YG, André, R & Deveaud-Plédran, B 2009, 'Observation of half-quantum vortices in an exciton-polariton condensate' Science, vol. 326, no. 5955, pp. 974 -976. https://doi.org/10.1126/science.1177980

Observation of half-quantum vortices in an exciton-polariton condensate. / Lagoudakis, K. G.; Ostatnický, T.; Kavokin, A. V.; Rubo, Y. G.; André, R.; Deveaud-Plédran, B.

In: Science, Vol. 326, No. 5955, 13.11.2009, p. 974 -976.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Observation of half-quantum vortices in an exciton-polariton condensate

AU - Lagoudakis, K. G.

AU - Ostatnický, T.

AU - Kavokin, A. V.

AU - Rubo, Y. G.

AU - André, R.

AU - Deveaud-Plédran, B.

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AB - 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 π rotation of the phase and a π 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.

KW - half-quantum vortices

KW - exciton polariton condensates

KW - polarization

KW - spectroscopy

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Lagoudakis KG, Ostatnický T, Kavokin AV, Rubo YG, André R, Deveaud-Plédran B. Observation of half-quantum vortices in an exciton-polariton condensate. Science. 2009 Nov 13;326(5955):974 -976. https://doi.org/10.1126/science.1177980