Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions | Научно-инновационный портал СФУ

Electrically turning periodic structures in cholesteric layer with conical–planar boundary conditions

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1038/s41598-021-87854-z

Аннотация: Electro-optical cell based on the cholesteric liquid crystal is studied with unique combination of the boundary conditions: conical anchoring on the one substrate and planar anchoring on another one. Periodic structures in cholesteric layer and their transformation under applied electric field are considered by polarizing optical microscopy, the experimental findings are supported by the data of the calculations performed using the extended Frank elastic continuum approach. Such structures are the set of alternating over- and under-twisted defect lines whose azimuthal director angles differ by 180 ∘. The U+ and U--defects of periodicity, which are the smooth transition between the defect lines, are observed at the edge of electrode area. The growth direction of defect lines forming a diffraction grating can be controlled by applying a voltage in the range of 0≤V≤1.3 V during the process. Resulting orientation and distance between the lines don’t change under voltage. However, at V> 1.3 V U+-defects move along the defect lines away from the electrode edges, and, finally, the grating lines collapse at the cell’s center. These results open a way for the use of such cholesteric material in applications with periodic defect structures where a periodicity, orientation, and configuration of defects should be adjusted. © 2021, The Author(s).

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Издание

Журнал: Scientific Reports

Выпуск журнала: Vol. 11, Is. 1

Номера страниц: 8409

ISSN журнала: 20452322

Издатель: Nature Research

Авторы

  • Prishchepa O. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)
  • Krakhalev M. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation, Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660049, Russian Federation)
  • Rudyak V. (Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russian Federation)
  • Sutormin V. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation, Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660049, Russian Federation)
  • Zyryanov V. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)

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