Laser-induced gratings in nematic/cholesteric mixtures

Espinet, Héctor; Lesiecki, Michael; Ramsburg, Michael
June 1987
Applied Physics Letters;6/29/1987, Vol. 50 Issue 26, p1924
Academic Journal
Laser-induced gratings are produced in thin films of mixtures of nematic and cholesteric liquid crystals doped with a dye. A transient grating regime is found which decays on the order of seconds; additionally, a ‘‘persistent’’ grating with lifetimes up to 16 h has been found. Mechanisms for creation and decay are discussed.


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