Switchable diffractive cholesteric gratings
- 8 September 1997
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 71 (10), 1350-1352
- https://doi.org/10.1063/1.119890
Abstract
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.Keywords
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