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Open AccessArticle

Phase Structure Recording in a Nematic Side-Chain Liquid-Crystalline Polymer

1
P.N. Lebedev Physical Institute, Leninsky pr., 53, Moscow 119991, Russia
2
Faculty of Physics, Lomonosov Moscow State University, Leninskie gory, Moscow 119991, Russia
3
International Centre of Laser Technology, Mendeleev University of Chemical Technology of Russia, Miusskaya pl., 9, Moscow 125047, Russia
4
Faculty of Chemistry, Lomonosov Moscow State University, Leninskie gory, Moscow 119991, Russia
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(2), 356; https://doi.org/10.3390/polym12020356
Received: 5 December 2019 / Revised: 5 January 2020 / Accepted: 15 January 2020 / Published: 6 February 2020
(This article belongs to the Special Issue High Performance Liquid Crystalline Polymers)
Dye-doped nematic side-chain liquid-crystalline polymers possess extraordinary large optical nonlinearity and ability to store the induced orientational deformations in a glassy state, which makes them a very promising material for photonic applications. In this study, the phase structures were generated and recorded in the bulk of a 50-μm layer of a nematic liquid-crystalline side-chain polymer, containing polyacrylate backbone, spacer having five methylene groups, and phenyl benzoate mesogenic fragment. The polymer was doped with KD-1 azodye. The director field deformations induced by the light beam close to the TEM01 mode were studied for different geometries of light–polymer interaction. The phase modulation depth of 2π was obtained for the 18-μm spacing between intensity peaks. The experimental data were analyzed based on the elastic continuum theory of nematics. The possibility to induce and record positive and negative microlenses in the polymer bulk was shown experimentally.
Keywords: liquid-crystalline polymer; optical nonlinearity; supramolecular structure; optical recording; Fréedericksz transition liquid-crystalline polymer; optical nonlinearity; supramolecular structure; optical recording; Fréedericksz transition
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MDPI and ACS Style

Budagovsky, I.; Kuznetsov, A.; Shvetsov, S.; Smayev, M.; Zolot’ko, A.; Bobrovsky, A.; Boiko, N.; Shibaev, V. Phase Structure Recording in a Nematic Side-Chain Liquid-Crystalline Polymer. Polymers 2020, 12, 356.

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