How the initial tilt angle of the director of a dual-frequency liquid crystal affects the electrooptic characteristics of cells

Галин И.Ф., Коншина Е.А. Влияние начального угла наклона директора двухчастотного жидкого кристалла на электрооптические характеристики ячеек // Оптический журнал. 2011. Т. 78. № 6. С. 71–74.

Galin I.F., Konshina E.A. How the initial tilt angle of the director of a dual-frequency liquid crystal affects the electrooptic characteristics of cells [in Russian] // Opticheskii Zhurnal. 2011. V. 78. № 6. P. 71–74.

I. F. Galin and E. A. Konshina, "How the initial tilt angle of the director of a dual-frequency liquid crystal affects the electrooptic characteristics of cells," Journal of Optical Technology. 78(6), 400-402 (2011). https://doi.org/10.1364/JOT.78.000400

This paper discusses cells filled with a dual-frequency nematic liquid crystal (DNLC) in which the initial tilt angle θp of the director was varied in the interval from 40° to 75° by varying the surface relief of the orienting layers. The experimental dependences of the time to change the phase lag by 2π at a wavelength of 0.65 µm on angle θp for longitudinal and transverse deformation of the DNLC layer have been obtained for the first time. It is shown that transverse elastic deformation is a slower process than longitudinal elastic deformation. The ON or OFF time of the cells as a result of the process of longitudinal elastic deformation occupied 1–2 ms when a field is applied with frequency 1 kHz, and was 3–9 ms for transverse deformation by applying an electric field with frequency 30 kHz.

The authors are thankful to Ivanova N.L. and Amosova L.P. for technical support in liquid crystall cells manufacturing.

The work was financially supported by the Federal Agency for Science and Innovations within the Federal Target Program under State Contract No. 02.740.11.0390.