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Optothermal vortex-solitons in liquid crystals

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By Gaetano Assanto, Urszula A. Laudyn, OptoElectronics Lab, NooEl—Nonlinear Optics
| osapublishing.org
Abstract We report on vortex-solitons generated in dye-doped nematic liquid crystals by a purely optothermal nonlocal nonlinearity. This response not only supports stable doughnut-shaped ordinary-wave beams with orbital angular momentum, but also provides self-confined solitary waves with excellent trajectory and profile stability over time. Using an interferometric technique, we also investigate the role of nonlocal nonlinearity in the non-illuminated axial region.
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