Dynamics of a director reorientation and optical response of polymer films filled with a liquid crystal under strong electric field

5th International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Pasechnik, S.V.^1 ; Shmeleva, D.V.^1 ; Chopik, A.P.^1 ; Vakulenko, A.A.^2 ; Zakharov, A.V.^2

Moscow Technological University, Moscow

119454, Russia^1

Saint Petersburg Institute for Machine Sciences, Russian Academy of Sciences, Saint Petersburg

199178, Russia^2

关键词: Applied voltages;    Cylindrical cavities;    Director reorientation;    Field application;    Liquid crystal 5Cb;    Nematic liquid crystals (NLC);    Optical response;    Strong electric fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/738/1/012096/pdf
DOI  :  10.1088/1742-6596/738/1/012096

来源: IOP

【 摘 要 】

The dynamics of the director reorientation in nematic liquid crystals (NLC) confined by cylindrical cavities of porous polymeric films under strong electric field E with has been investigated theoretically. The main attention was paid to the specific mode of field application characterized by abrupt changes of the applied voltage's polarity. In experiments with porous films filled with a liquid crystal 5CB such mode resulted in appearance of strong peak -like decreasing of an optical transparence of the films. Two mechanisms of such unusual response based on assumption of electrically induced motion of ions and overall motion of a liquid were considered and applied to explain experimental results.