In this paper, we describe a novel liquid crystal-polymer composite material system which allows fast, single-step recording of volume holograms with diffraction efficiency approaching 100% and narrow angular selectivity. The diffraction efficiencies (DE) are controllable by applied electric fields. We have achieved complete switching of a first-order Bragg diffracted beam into the zero-order with an applied field of /spl sim/8 V//spl mu/m and 50-100 microsecond response time. Addition of a surfactant octanoic acid lowered the switching voltage to /spl sim/5 V//spl mu/m. We also recorded reflection gratings in this material system. We have demonstrated image storage and electro-optical readout with these materials. Low voltage, high resolution scanning electron microscopy studies have confirmed that gratings formed in this material system consist of periodic polymer-dispersed liquid crystal planes.


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    Titel :

    Electro-optical switching of volume holographic gratings recorded in polymer dispersed liquid crystals


    Beteiligte:
    Natarajan, L.V. (Autor:in) / Sutherland, R.L. (Autor:in) / Tondiglia, V.P. (Autor:in) / Bunning, T. (Autor:in) / Adams, W.W. (Autor:in)


    Erscheinungsdatum :

    01.01.1996


    Format / Umfang :

    772637 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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