Publication:
Fast liquid crystal light shutter with polymer stabilization

Дата
2021
Авторы
Hegde, G.
Komitov, L.
Barbero, G.
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Научные группы
Организационные подразделения
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Инженерно-физический институт биомедицины
Цель ИФИБ и стратегия развития – это подготовка высококвалифицированных кадров на базе передовых исследований и разработок новых перспективных методов и материалов в области инженерно-физической биомедицины. Занятие лидерских позиций в биомедицинских технологиях XXI века и внедрение их в образовательный процесс, что отвечает решению практикоориентированной задачи мирового уровня – диагностике и терапии на клеточном уровне социально-значимых заболеваний человека.
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Аннотация
© 2021 Institute of Physics Publishing. All rights reserved.We present a fast-switching liquid crystal device comprising fringe field switching (FFS) electrode structure deposited onto one of the device substrates. Initially, the liquid crystal in the device has a homeotropic alignment. The generated periodic electric field by the FFS electrode results in a periodic splay/bend elastic deformation, thus giving rise to flexoelectric polarization along the substrate normal. At low applied voltages, this periodic elastic deformation, is substantially localized in a very thin portion of the liquid crystal layer adjacent to the substrate surface bearing the electrode and it is stabilized by a polymer network. Thus, the flexoelectric polarization becomes permanently present in the device and has non-zero value at field-off state. The polymer network with splay/bend configuration occupies very small part of the liquid crystal layer (∼0.5 μm), which is thinner than the light wavelength and therefore is optically invisible. Simultaneously with the formation of the polymer network, possessing splay/bend configuration, a polymer network with polymeric bundles oriented preferably along the substrates' normal is formed. As we will show, the presence of the polymer network, consisting of surface and bulk parts, reduces substantially the switching times of the liquid crystal device more than one order bringing them to μs range 2021 IOP Publishing Ltd.
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Hegde, G. Fast liquid crystal light shutter with polymer stabilization / Hegde, G., Komitov, L., Barbero, G. // Journal of Physics D: Applied Physics. - 2021. - 54. - № 42. - 10.1088/1361-6463/ac15cf
URI
https://www.doi.org/10.1088/1361-6463/ac15cf
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85112649703&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000680168600001
 https://openrepository.mephi.ru/handle/123456789/24466
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