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Сибирский государственный университет
науки и технологий имени академика М.Ф. Решетнева

Сибирский аэрокосмический журнал
ISSN 2712-8970 (Print) ISSN 2782-5760 (on-line)

Сведения об образовательной организации

UDK 532.783 Doi: 10.31772/2712-8970-2021-22-1-201-209
Electrooptical response of the films of polymer dispersed nematic with conical boundary conditions
Feyzer K. A., Krakhalev M. N., Shabanov V. F., Zyryanov V. Ya.
Kirensky Institute of Physics, Federal Research Center KSC SB RAS; 50/38, Akademgorodok, Krasnoyarsk, 660036, Russian Federation. Institute of Engineering Physics and Radio Electronics, Siberian Federal University; 79, Svobodny Av., Krasnoyarsk, 660041, Russian Federation. Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”; 50, Akademgorodok St., Krasnoyarsk, 660036, Russian Federation.
The electrooptic response of films of polymer dispersed nematic under conical boundary conditions has been investigated. An axial-bipolar director configuration is formed in nematic droplets. It has been shown that initially, the orientation of droplet’s bipolar axes is chaotic both in the sample plane and relative to the normal to the substrates. The applied voltage U orients the droplet’s bipolar axes parallel to the electric field and the reorientation process is threshold only when the bipolar axis is initially orthogonal to the substrate normal. Accordingly, the samples strongly scatter light in the initial state, and the optical response to an electric field is thresholdless. The samples with a film thickness of 5, 10, 20 and 30 μm have been studied. All the samples under study are characterized by a high transmittance and contrast ratio, which for a 30 μm sample are equal to 84 % and 5536, respectively, and achieved at U = 12 V. The results obtained are relevant for use in low-power optoelectronic devices required for the development of energy-saving technologies in aerospace engineering.
Keywords: electro-optical material, nematic, polymer dispersed liquid crystal, electro-optical response, conical boundary conditions, orientation structure.
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Feyzer Kristina Andreevna – engineer, laboratoy of molecular spectroscopy; Kirensky Institute of Physics, Federal Research Center KSC SB RAS. Е-mail: fka@iph.krasn.ru.

Krakhalev Mikhail Nikolaevich – Cand. Sc., senior researcher, laboratory of molecular spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Associate Professor at the Department of General Physics, Institute of Engineering Physics and Radio Electronics, Siberian Federal University. Е-mail: kmn@iph.krasn.ru.

Shabanov Vasily Philipovich – Dr. Sc., Professor, Academician, Scientific director of Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”. Е-mail: shabanov@ksc.krasn.ru.

Zyryanov Victor Yakovlevich – Dr. Sc., Professor, Head of the scientific direction and Laboratory of molecular spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS; Head of the Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”. Е-mail: zyr@iph.krasn.ru.


  Electrooptical response of the films of polymer dispersed nematic with conical boundary conditions