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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 15 — Jul. 16, 2012
  • pp: 16366–16373

Role of supercurrents on vortices formation in polariton condensates

C. Antón, G. Tosi, M. D. Martín, L. Viña, A. Lemaître, and J. Bloch  »View Author Affiliations


Optics Express, Vol. 20, Issue 15, pp. 16366-16373 (2012)
http://dx.doi.org/10.1364/OE.20.016366


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Abstract

Observation of quantized vortices in non-equilibrium polariton condensates has been reported either by spontaneous formation and pinning in the presence of disorder or by imprinting them onto the signal or idler of an optical parametric oscillator (OPO). Here, we report a detailed analysis of the creation and annihilation of polariton vortex-antivortex pairs in the signal state of a polariton OPO by means of a short optical Gaussian pulse at a certain finite pump wave-vector. A time-resolved, interferometric analysis of the emission allows us to extract the phase of the perturbed condensate and to reveal the dynamics of the supercurrents created by the pulsed probe. This flow is responsible for the appearance of the topological defects when counter-propagating to the underlying currents of the OPO signal.

© 2012 OSA

OCIS Codes
(100.5070) Image processing : Phase retrieval
(020.1475) Atomic and molecular physics : Bose-Einstein condensates
(100.3175) Image processing : Interferometric imaging
(140.3945) Lasers and laser optics : Microcavities

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: May 1, 2012
Revised Manuscript: May 31, 2012
Manuscript Accepted: June 25, 2012
Published: July 3, 2012

Citation
C. Antón, G. Tosi, M. D. Martín, L. Viña, A. Lemaître, and J. Bloch, "Role of supercurrents on vortices formation in polariton condensates," Opt. Express 20, 16366-16373 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-15-16366


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  32. For the supercurrent calculations, eventual phase jumps between 0 and 2π, where the gradient of the phase is not well defined, (see, for example the region between the white arrows in the Fig. 3(a)), are circumvented using ∇Φs (r,t) = −i∇ exp(iΦs (r,t)) / exp (iΦs (r,t)).

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