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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 22 — Oct. 24, 2011
  • pp: 21457–21466

Dipole azimuthons and vortex charge flipping in nematic liquid crystals

Yana V. Izdebskaya, Anton S. Desyatnikov, Gaetano Assanto, and Yuri S. Kivshar  »View Author Affiliations


Optics Express, Vol. 19, Issue 22, pp. 21457-21466 (2011)
http://dx.doi.org/10.1364/OE.19.021457


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Abstract

We demonstrate self-trapped laser beams carrying phase singularities in nematic liquid crystals. We experimentally observe the astigmatic transformation of vortex beams into spiraling dipole azimuthons accompanied by power-dependent charge-flipping of the on-axis phase singularity. The latter topological reactions involve triplets of vortex lines and resemble pitchfork bifurcations.

© 2011 OSA

OCIS Codes
(160.3710) Materials : Liquid crystals
(050.4865) Diffraction and gratings : Optical vortices
(190.6135) Nonlinear optics : Spatial solitons

ToC Category:
Nonlinear Optics

History
Original Manuscript: August 5, 2011
Revised Manuscript: October 4, 2011
Manuscript Accepted: October 5, 2011
Published: October 17, 2011

Citation
Yana V. Izdebskaya, Anton S. Desyatnikov, Gaetano Assanto, and Yuri S. Kivshar, "Dipole azimuthons and vortex charge flipping in nematic liquid crystals," Opt. Express 19, 21457-21466 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-22-21457


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