Electrically controlled surface diffraction gratings in nematic liquid crystals
Optics Letters, Vol. 25, Issue 6, pp. 414-416 (2000)
http://dx.doi.org/10.1364/OL.25.000414
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Abstract
Photorefractive diffraction gratings were studied in cells of homeotropically aligned pentyl-cyanobiphenyl liquid crystal. These holographic gratings were induced by the simultaneous and nonsimultaneous application of dc and coherent optical electric fields. The observed behavior was consistent with a predominantly surface-mediated photorefractive effect. Beam coupling was observed in all cases and led to a model involving screened and unscreened interfacial trapped charges driving a modulation of the easy axis. Holographic gratings could be switched on and off by the application of a small voltage.
© 2000 Optical Society of America
OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(160.3710) Materials : Liquid crystals
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
(210.4770) Optical data storage : Optical recording
(240.6670) Optics at surfaces : Surface photochemistry
Citation
J. Zhang, V. Ostroverkhov, K. D. Singer, V. Reshetnyak, and Yu. Reznikov, "Electrically controlled surface diffraction gratings in nematic liquid crystals," Opt. Lett. 25, 414-416 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-6-414
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