A switchable liquid crystal diffraction grating, responsive to both the frequency and magnitude of an applied voltage, is demonstrated. The grating is based on polymer stabilization of modulated states of the liquid crystal optic axis induced at frequencies near a sign inversion of the dielectric anisotropy. In a particular case of frequency-based switching, 70% of the transmitted intensity of a 633 nm laser beam can be shifted into or out of a +/-12 degrees forward are by changing the frequency of an applied voltage between 10 and 16 kHz at a fixed amplitude of 27 V. (C) 2001 American Institute of Physics.
Applied Physics Letters
Copyright 2001 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 78, 3782 (2001) and may be found at http://dx.doi.org/10.1063/1.1377322.
Kang, Shin-Woong; Sprunt, Samuel N.; Chien, Liang-Chy (2001). Switchable Diffraction Gratings Based on Inversion of the Dielectric Anisotropy in Nematic Liquid Crystals. Applied Physics Letters 78(24) 3782-3784. Retrieved from https://oaks.kent.edu/cpippubs/35