In this work we present electrically controlled wavefront modulators, such as diffusers, Fresnel zone plates and vortex-producing lenses, made from LiNbO/sub 3/ wafers containing 180/spl deg/ ferroelectric domains. Since the sign of the change of the refractive index produced by the linear electrooptic effect depends on the direction of the spontaneous polarization of the crystal, the wavefront of a beam incident on a z-cut LiNbO/sub 3/ wafer containing 180/spl deg/ ferroelectric domains will be modified if an electric field is applied to the wafer. The applied field and the direction of propagation of the beam incident on these modulators are parallel to the c-axis of the wafer.


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    Title :

    Electrically-controlled wavefront modulators made with 180/spl deg/ domain-structures in congruently-grown LiNbO/sub 3/


    Contributors:
    Cudney, R.S. (author) / Rios, L.A. (author) / Escamilla, H.M. (author)


    Publication date :

    2005-01-01


    Size :

    814139 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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