Effect of an electric field on the orientation of a liquid crystal in a cell with a nonuniform director distribution

Autor: A. V. Svanidze, A. P. Kovshik, N. A. Karetnikov, E. I. Ryumtsev, A. S. Sakhatskii, E. V. Aksenova, A. A. Karetnikov
Rok vydání: 2016
Předmět:
Zdroj: Journal of Experimental and Theoretical Physics. 122:942-949
ISSN: 1090-6509
1063-7761
Popis: The electric field-induced reorientation of a nematic liquid crystal in cells with a planar helicoidal or a homeoplanar structure of a director field is studied theoretically and experimentally. The dependences of the capacitances of these systems on the voltage in an applied electric field below and above the Freedericksz threshold are experimentally obtained and numerically calculated. The calculations use the director distribution in volume that is obtained by direct minimization of free energy at various voltages. The inhomogeneity of the electric field inside a cell is taken into account. The calculation results are shown to agree with the experimental data.
Databáze: OpenAIRE