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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 22 — Aug. 1, 2011
  • pp: 4295–4301

All-optical switchable holographic Fresnel lens based on azo-dye-doped polymer-dispersed liquid crystals

Hossein Jashnsaz, Nahid Hosain Nataj, Ezeddin Mohajerani, and Amir Khabbazi  »View Author Affiliations

Applied Optics, Vol. 50, Issue 22, pp. 4295-4301 (2011)

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Fabrication of an all-optical switchable holographic liquid crystal (LC) Fresnel lens based on azo-dye-doped polymer-dispersed LCs is reported using a Michelson interferometer. It is found that, upon circularly polarized photoirradiation, the diffraction efficiency of the fabricated Fresnel lens was increased significantly in a reversible manner. We believe this is due to the anisotropy induced by reorientation of the LC molecules coupled with azo-dye molecule orientation due to trans–cis–trans photoisomerization, which modulates the refractive index of the LC-rich regions. We also studied the effect of azo dye on the polarization dependency of the fabricated lens.

© 2011 Optical Society of America

OCIS Codes
(090.2890) Holography : Holographic optical elements
(160.5470) Materials : Polymers
(230.1150) Optical devices : All-optical devices
(230.3720) Optical devices : Liquid-crystal devices
(050.1965) Diffraction and gratings : Diffractive lenses

ToC Category:

Original Manuscript: April 6, 2011
Revised Manuscript: June 21, 2011
Manuscript Accepted: June 21, 2011
Published: July 21, 2011

Hossein Jashnsaz, Nahid Hosain Nataj, Ezeddin Mohajerani, and Amir Khabbazi, "All-optical switchable holographic Fresnel lens based on azo-dye-doped polymer-dispersed liquid crystals," Appl. Opt. 50, 4295-4301 (2011)

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