Dipole azimuthons and vortex charge flipping in nematic liquid crystals

被引：43

作者：

Izdebskaya, Yana V. ^{[1
]}

Desyatnikov, Anton S. ^{[1
]}

Assanto, Gaetano ^{[2
]}

Kivshar, Yuri S. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 0200, Australia

[2] Univ Rome Roma Tre, NooEL Nonlinear Opt & OptoElect Lab, I-00146 Rome, Italy

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 22期

基金：

澳大利亚研究理事会;

关键词：

NONLOCAL NONLINEAR MEDIA; ORBITAL ANGULAR-MOMENTUM; MODE VECTOR SOLITONS; OPTICAL VORTICES; SINGULAR OPTICS; WAVE-GUIDES; TRANSFORMATIONS; BEAM; DYNAMICS;

D O I：

10.1364/OE.19.021457

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2011 Optical Society of America

引用

页码：21457 / 21466

页数：10

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