Dipole azimuthons and vortex charge flipping in nematic liquid crystals | Zendy

Yana V. Izdebskaya | Zendy; Anton S. Desyatnikov | Zendy; Gaetano Assanto | Zendy; Yuri S. Kivshar | Zendy

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Dipole azimuthons and vortex charge flipping in nematic liquid crystals

Author(s) -

Yana V. Izdebskaya,

Anton S. Desyatnikov,

Gaetano Assanto,

Yuri S. Kivshar

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.021457

Subject(s) - liquid crystal , optical vortex , vortex , dipole , optics , physics , topological quantum number , phase (matter) , singularity , condensed matter physics , gravitational singularity , charge (physics) , quantum mechanics , geometry , mathematics , thermodynamics

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.

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