Investigation of liquid-crystal polarization-plane switches based on the twist effect and utilizing two-frequency control

An experimental investigation was made of the static and dynamic modulation characteristics and angular dependences of the contrast associated with the twist effect in nematic liquid crystals with low-frequency inversion of the sign of their dielectric anisotropy. It is shown that two-frequency control of the twist effect can be used as the basis of fairly fast wide-aperture switches of the plane of polarization of light.