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A. P. Chopik^1,2, S. V. Pasechnik¹, D. V. Shmeliova¹, D. A. Semerenko¹, A. V. Dubtsov¹, V. G. Chigrinov²

Author affiliations
¹Moscow State University of Instrument Engineering and Computer Science, Problem Laboratory of Molecular Acoustics,
Stromynka, 20, 107996 Moscow, Russia. 
E-mail: s-p-a-s-m@mail.ru
²Electronic and Computer Engineering Department, Hong Kong University of Science and Technology,
Clear Water Bay, Kowloon, Hong Kong. 
E-mail: eechigr@ust.hk

Abstract
The results of electrooptical measurements of porous PET films filled with a nematic liquid crystal (5CB) are presented. Frequency dependence of electro-optical response was found. After applying electric field with fast change of the polarity at low frequencies (f<f_c) an impulse of light intensity appears and then decays for the time which is much shorter than the electric pulse duration. The dependences of critical frequency f_c, threshold voltages and characteristic times on a pore diameter d were established. Such unusual behavior of the electro-optical response at low frequencies is probably assigned to the orienting action of the specific shear electroosmotic flow inside the pores.

Keywords: liquid crystal, pores, anisotropic media