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Open AccessArticle

Thermo-Optical Generation of Particle-Like Structures in Frustrated Chiral Nematic Film

1
Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
2
Lebedev Physical Institute, 119991 Moscow, Russia
3
Institut Charles Sadron, University of Strasbourg, CNRS, 67034 Strasbourg, France
*
Author to whom correspondence should be addressed.
Crystals 2019, 9(11), 574; https://doi.org/10.3390/cryst9110574
Received: 4 October 2019 / Revised: 25 October 2019 / Accepted: 28 October 2019 / Published: 31 October 2019
(This article belongs to the Special Issue Localized Optical Modes in Liquid Crystals)
The creation of metastable particle-like structures in frustrated (unwound) chiral nematic film containing light-absorbing additive is studied. It is shown that such localized structures can be generated by the thermo-optical action of a focused laser beam or arise spontaneously at a phase transition from an isotropic to a liquid crystal state. Observed axisymmetric patterns resemble cholesteric spherulites with toroidal double-twisted director-field configuration. View Full-Text
Keywords: chiral nematic liquid crystal; azobenzene dye; light-matter interaction; phase transition; particle-like structure; optical memory; nonlinear optics chiral nematic liquid crystal; azobenzene dye; light-matter interaction; phase transition; particle-like structure; optical memory; nonlinear optics
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Shvetsov, S.; Orlova, T.; Emelyanenko, A.V.; Zolot’ko, A. Thermo-Optical Generation of Particle-Like Structures in Frustrated Chiral Nematic Film. Crystals 2019, 9, 574.

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