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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 2 — Jan. 10, 2010
  • pp: 275–280

Polarization-independent holographic gratings based on azo-dye-doped polymer-dispersed liquid-crystal films

Andy Ying-Guey Fuh, Che-Chang Chen, Ko-Ting Cheng, Cheng-Kai Liu, and Wei-Ko Chen  »View Author Affiliations


Applied Optics, Vol. 49, Issue 2, pp. 275-280 (2010)
http://dx.doi.org/10.1364/AO.49.000275


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Abstract

We demonstrate polarization-independent holographic gratings (PIHGs) based on azo-dye-doped polymer-dispersed liquid crystal films. The PIHGs are recorded by irradiation under an intensity-modulated interference field, generated by two linearly polarized green optical beams, and by simultaneously applying a suitable AC voltage to the sample. The photoexcited azo dyes are adsorbed onto the UV-cured polymer film with their long axes parallel to the normal of the substrate. When the applied voltage is switched off, the PIHGs are generated with periodic modulation of liquid-crystal structures with transparently homeotropic and randomly scattered alignments. Additionally, the generated PIHGs can be completely switched off by an applied voltage.

© 2010 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(160.3710) Materials : Liquid crystals
(160.5470) Materials : Polymers

ToC Category:
Diffraction and Gratings

History
Original Manuscript: October 22, 2009
Revised Manuscript: December 4, 2009
Manuscript Accepted: December 4, 2009
Published: January 8, 2010

Citation
Andy Ying-Guey Fuh, Che-Chang Chen, Ko-Ting Cheng, Cheng-Kai Liu, and Wei-Ko Chen, "Polarization-independent holographic gratings based on azo-dye-doped polymer-dispersed liquid-crystal films," Appl. Opt. 49, 275-280 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-2-275

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