This study proposes a novel technique in fabricating permanent switchable gratings in composite materials which are characterized by both lower scattering losses and lower driving electric fields in comparison with usual PDLC gratings. Such a technique exploits the interference pattern produced by two UV (cw) laser beams. Acting on a solution of highly mutually soluble pre-polymer and LC components sandwiched in a glass cell, the interference pattern yields a grating which is composed by a sequence of continuously aligned LC layers separated by isotropic polymer slides. This is the so called POLICRYPS (polymer-liquid crystal-polymer-slides) morphology obtained by a simple and low cost technique.


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    Title :

    Novel permanent and electrically switchable diffraction gratings made of polymeric slides and nematic liquid crystal layers


    Contributors:
    d'Alessandro, A. (author) / Asquini, R. (author) / Gizzi, C. (author) / Caputo, R. (author) / Veltri, A. (author) / Umeton, C. (author)


    Publication date :

    2003-01-01


    Size :

    154201 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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