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; A. V. Sukhov

doi:10.1364/OL.29.001405

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, A. V. Sukhov

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

49 Citas (Scopus)

Resumen

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.

Idioma original	Inglés
Páginas (desde-hasta)	1405-1407
Número de páginas	3
Publicación	Optics Letters
Volumen	29
N.º	12
DOI	https://doi.org/10.1364/OL.29.001405
Estado	Publicada - 15 jun. 2004
Publicado de forma externa	Sí

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AU - d’Alessandro, A.

AU - Asquini, R.

AU - Gizzi, C.

AU - Caputo, R.

AU - Umeton, C.

AU - Veltri, A.

AU - Sukhov, A. V.

PY - 2004/6/15

Y1 - 2004/6/15

N2 - 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.

AB - 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.

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JO - Optics Letters

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

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