Applied Physics Letters
Electrically switchable diffractive gratings based on cholesteric liquid crystals are suggested. An electric field switches the cholesteric cell between three states: two with a uniform in-plane director and one with a periodic in-plane director modulation. The modulated state produces a Raman-Nath diffractive effect. Characteristic time of switching is of the order of 10 ms. Diffractive properties depend on the polarization of the incident beam and the direction of surface orientation. (C) 1997 American Institute of Physics.
Subacius, Darius; Bos, Philip J.; and Lavrentovich, Oleg (1997). Switchable Diffractive Cholesteric Gratings. Applied Physics Letters 71(10), 1350-1352. Retrieved from http://digitalcommons.kent.edu/cpippubs/24