Dipole azimuthons and vortex charge flipping in nematic liquid crystals

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

Research output: Contribution to journalArticle

46 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)21457-21466
Number of pages10
JournalOptics Express
Volume19
Issue number22
DOIs
Publication statusPublished - Oct 24 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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