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Optics Letters

Optics Letters


  • Vol. 25, Iss. 6 — Mar. 15, 2000
  • pp: 414–416

Electrically controlled surface diffraction gratings in nematic liquid crystals

J. Zhang, V. Ostroverkhov, K. D. Singer, V. Reshetnyak, and Yu. Reznikov  »View Author Affiliations

Optics Letters, Vol. 25, Issue 6, pp. 414-416 (2000)

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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

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)

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