Electro-optical properties of cholesteric with tangential-conical anchoring at oblique light incidence

Kostikov, D.A., Krakhalev, M.N., Nabol, S.V., (...), Timofeev, I.V., Zyryanov, V.Y.A.// Optics Express//

The effects of the incidence angle and applied voltage on the polarization state of light passing through a cholesteric (CLC) with tangential-conical boundary conditions are investigated. Both cases in which the CLC director on the input substrate is perpendicular or parallel to the light incidence plane are considered. The polarization azimuth following mode is characterized as a function of the incidence angle and voltage. The wavelength-independent mode of change in light polarization has been discovered. The influence of the helix pitch and CLC layer thickness on the realized modes parameters is in good agreement with theoretical predictions based on the Frank-Oseen approach.