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Optics Express

Optics Express

  • Editor: C. Martijin de Sterke
  • Vol. 15, Iss. 9 — Apr. 30, 2007
  • pp: 5872–5878

Electrically tunable two-dimensional liquid crystals gratings induced by polarization holography

C. Provenzano, P. Pagliusi, and G. Cipparrone  »View Author Affiliations

Optics Express, Vol. 15, Issue 9, pp. 5872-5878 (2007)

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Two-dimensional (2D) gratings made up of an array of differently twisted nematic structures are obtained by crossed assembling of 1D polarization holograms recorded at the photoaligning substrates. The rotating linear polarization pattern, produced by the interference of two opposite circularly polarized beams, is recorded on the azo-dye doped polyimide aligning layers. The 2D gratings diffract light in different directions with different polarization states, that can be optically controlled. Orthogonal circularly and linearly polarized diffraction orders are simultaneously obtained irradiating the grating with a linearly polarized beam. An external ac voltage allows to completely control the diffracted energy distribution.

© 2007 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(090.2890) Holography : Holographic optical elements
(160.3710) Materials : Liquid crystals
(230.5440) Optical devices : Polarization-selective devices

ToC Category:
Diffraction and Gratings

Original Manuscript: January 18, 2007
Revised Manuscript: February 8, 2007
Manuscript Accepted: February 12, 2007
Published: April 27, 2007

C. Provenzano, P. Pagliusi, and G. Cipparrone, "Electrically tunable two-dimensional liquid crystals gratings induced by polarization holography," Opt. Express 15, 5872-5878 (2007)

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