Reversible photoinduced anisotropy of azoxybenzenes in nematic liquid crystal phase and in solid polymer solutionsa

Kinetic peculiarities of the induced phase transition "nematic-isotropic liquid" in the layers of ZhK-440D, based on a mixture of liquid crystal (LC) azoxybenzenes have been investigated. Different cases of the absorption of polarized or unpolarized radiation were realized. Spectral changes of ZhK-440D, as well as the influence of activating radiation wavelength (365 and 405 nm) on the change in the transmission of the LC cell (10 μm thick) with rubbed polymer layers as orientants have been measured. At the same time the kinetics of changes in the intensity of light scattering in the transparency region (λ = 632.8 nm) formed by the spatial anisotropy of the diffraction pattern in the cross section of the probe beam was measured. It was showed that the holograms recorded in layers of the solid molecular solutions of the ZhK-440D mixture (12 wt. %) in polymetyl metacrylate with the help of He-Cd laser (λ = 325 nm) were stored for a few hours, whereas in the pure ZhK-440D they disappeared in a few minutes.

Authors
Kozenkov V.M.1 , Spakhov A.A.2 , Belyaev V.V. 2, 3 , Chausov D.N.2
Publisher
ФГБОУ ВО Ивановский государственный университет (Иваново)
Number of issue
1
Language
Russian
Pages
29-37
Status
Published
Volume
16
Year
2016
Organizations
  • 1 NPO Kripten, 2 Priborostroiteley St., Dubna, Moscow Region, 141981, Russian Federation
  • 2 Moscow Region State University, Educational and research laboratory of theoretical and applied nanotechnology, 10-a Radio St., Moscow, 105005, Russian Federation
  • 3 Peoples' Friendship University of Russia, 6 Miklukho-Maklaya St., Moscow, 117198, Russian Federation
Keywords
Anisotropy; Birefringence; Dichroism; Liquid crystals
Date of creation
19.10.2018
Date of change
10.06.2021
Short link
https://repository.rudn.ru/en/records/article/record/4320/
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