Photovoltaic gratings recorded in Praeseodymium doped La3Ga5SiO14 crystals

Abstract

Because of their unique sensitivity to optical polarization during recording of information, photovoltaic crystals are of particular interest for optical data processing. Light induced refractive index changes in La3Ga5SiO15 : Pr3 + piezoelectric crystals [1] was previously studied. Hereafter, we present and analyse the first recording of holograms in one of these samples. La3Ga5SiO15 belongs to the point group symmetry 32. Our sample was grown by the Csochralski method. Its dimensions along the crystallographic xyz directions are 10.5×8.5×1.4 mm3. This sample presents a green color.