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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 6 — Mar. 20, 2006
  • pp: 2197–2202

AC electric field assisted photo-induced high efficiency orientational diffractive grating in nematic liquid crystals

Liang Song, Wing-Kee Lee, and Xiaosheng Wang  »View Author Affiliations

Optics Express, Vol. 14, Issue 6, pp. 2197-2202 (2006)

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An orientational grating with reduced scattering noise is formed in fullerene-doped and undoped homeotropic nematic liquid crystal cells by simultaneous application of both spatially modulated light and ac electric field. The first-order diffraction efficiency obtained in the fullerene-doped cell reaches ~30 %, approaching the maximum value predicted by theory. Effective nonlinear index coefficient is ~0.9 cm2/W and ~1000 times larger than previous observations in C60-doped nematic liquid crystals using a dc field. Grating formation time can be as short as 1 s, which is ~100 times shorter than those found by us using a dc field and previous studies.

© 2006 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

ToC Category:

Original Manuscript: January 11, 2006
Revised Manuscript: March 8, 2006
Manuscript Accepted: March 9, 2006
Published: March 20, 2006

Liang Song, Wing-Kee Lee, and Xiaosheng Wang, "AC electric field assisted photo-induced high efficiency orientational diffractive grating in nematic liquid crystals," Opt. Express 14, 2197-2202 (2006)

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