Electrically controlled porous polymer films filled with liquid crystals: New possibilities for photonics and THz applications

Dynamic and Static Light Scattering at Phase Transitions in Liquid Crystal Confined Into Porous Polymer Film

“…In turn, the effective value of the shear viscosity depends on the orientational structure of LC, formed in porous film. Direct measurements of the shear viscosity of liquid crystals, flowing through the porous film [7,8], confirmed the non-homogeneous type of such structure, which is in accordance with the previously obtained results [4][5][6]. It makes the problem of calculation of normal modes of the director fluctuations inside pores more difficult in the comparison with the case of homogeneous orientation, realized in plane layers of LC [1].…”

“…on the basis of analysis of relaxation times of director fluctuations. Porous films with cylindrical cavities filled by LC are interested from the fundamental point of view and can be used, for example, in photonics [4][5][6] and microfluidics [7]. For the letter application, effective shear viscosity plays the essential role, as it determines the technical characteristics of LC electro-hydrodynamic pump [7].…”

Waveguide Propagation of Light in Polymer Porous Films Filled with Nematic Liquid Crystals

“…8. This response can be explained by the additional influence of ion's motion [12]. Nevertheless, the strong decrease of the instant values of light intensity, registered in this case, can be also explained by the above mentioned mechanism.…”

“…with normally oriented open pores of submicron and micron sizes, filled with LC was experimentally studied in [10,11]. It was shown that such systems are very promising for applications in photonic waveguide and terahertz (THz) devices [11,12].…”

Electrorheology of Liquid Crystals

“…The particular class of composite materials includes the porous polymer PET films, filled with liquid crystals. The ability to control optical properties of these materials using an electric field and light irradiation [3,4] makes them promising for elaboration of new photonics [5] and microfluidic [6,7,8] devices. There is a well elaborated industrial technology for production of the porous polymer matrix, which provides the samples of films with open cylindrical pores of submicron and micron diameters [9].…”