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 |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Solid-state physics Condensed matter physics Field (physics) business.industry General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Condensed Matter::Soft Condensed Matter Optics Planar Liquid crystal Electric field Orientation (geometry) 0103 physical sciences 010306 general physics 0210 nano-technology business Energy (signal processing) Voltage |
| 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 |
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