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

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.

Año de publicación:

2004

Keywords:

    Fuente:

    scopusscopus
    googlegoogle

    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Polímero
    • Ciencia de materiales
    • Ciencia de materiales

    Áreas temáticas:

    • Física aplicada
    • Imprenta y actividades conexas
    • Química física

    Contribuidores:

    Asquini R.Asquini R.
    Gizzi C.Gizzi C.
    Umeton C.P.Umeton C.P.
    Sukhov A.V.Sukhov A.V.
    Alessandro VeltriAlessandro Veltri
    Caputo R.Caputo R.
    d’Alessandro A.d’Alessandro A.