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Optics Letters

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  • Vol. 29, Iss. 12 — Jun. 15, 2004
  • pp: 1405–1407

Electro-optic properties of switchable gratings made of polymer and nematic liquid-crystal slices

A. d'Alessandro, R. Asquini, C. Gizzi, R. Caputo, C. Umeton, A. Veltri, and A. V. Sukhov  »View Author Affiliations


Optics Letters, Vol. 29, Issue 12, pp. 1405-1407 (2004)
http://dx.doi.org/10.1364/OL.29.001405


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Abstract

We report the diffraction properties at wavelengths of 632.8 and 1550 nm for volume transmission gratings made of a sequence of continuously aligned nematic liquid-crystal layers separated by isotropic polymer slices. The gratings are generated by holographically curing a solution of liquid crystal diluted in an isotropic prepolymer by means of a laser beam at a wavelength of 352 nm with a total intensity of approximately 10 mW/cm2 . A diffraction efficiency of 98% was measured, and an electric field as low as 5 V/μm switches off the phase grating. Measured angular spectra are fitted by use of the modified coupled-mode theory including the effects of grating birefringence.

© 2004 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(090.7330) Holography : Volume gratings
(230.3720) Optical devices : Liquid-crystal devices

Citation
A. d'Alessandro, R. Asquini, C. Gizzi, R. Caputo, C. Umeton, A. Veltri, and A. V. Sukhov, "Electro-optic properties of switchable gratings made of polymer and nematic liquid-crystal slices," Opt. Lett. 29, 1405-1407 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-12-1405


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