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Dipole azimuthons and vortex charge flipping in nematic liquid crystals

Izdebskaya, Yana V; Desyatnikov, Anton S; Assanto, Gaetano; Kivshar, Yuri S


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.

CollectionsANU Research Publications
Date published: 2011-10-24
Type: Journal article
Source: Optics express
DOI: 10.1364/OE.19.021457


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