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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 9 — Sep. 1, 2006
  • pp: 1737–1742

Polarization characteristics of diffracted beams from twisted nematic gratings fabricated by the photoalignment effect in dye-doped liquid-crystal films

Wei-Yen Wu, Ting-Shan Mo, and Andy Ying-Guey Fuh  »View Author Affiliations


JOSA B, Vol. 23, Issue 9, pp. 1737-1742 (2006)
http://dx.doi.org/10.1364/JOSAB.23.001737


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Abstract

The polarization characteristics of diffracted beams from twisted nematic (TN) gratings are investigated. The TN grating is fabricated by exploiting the photoalignment effect in a dye-doped homogeneous liquid-crystal film. Experimental results indicate that the irradiation of an azo-dye-doped liquid-crystal film with appropriate light can induce dye adsorption on a glass substrate. The adsorbed dyes then reorient the liquid-crystal director perpendicular to the pump-beam polarization. The polarizations of the diffracted beams from such a TN grating are systematically studied. The experimental results correlate well with theory. Additionally, the TN grating can be used as a polarization beam splitter.

© 2006 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(160.3710) Materials : Liquid crystals
(210.4770) Optical data storage : Optical recording
(230.1360) Optical devices : Beam splitters

ToC Category:
Diffraction and Gratings

History
Original Manuscript: November 23, 2005
Revised Manuscript: February 10, 2006
Manuscript Accepted: March 21, 2006

Citation
Wei-Yen Wu, Ting-Shan Mo, and Andy Ying-Guey Fuh, "Polarization characteristics of diffracted beams from twisted nematic gratings fabricated by the photoalignment effect in dye-doped liquid-crystal films," J. Opt. Soc. Am. B 23, 1737-1742 (2006)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-23-9-1737


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