Capillary liquid epitaxial growth of LiNbO3 and LiTaO3 single-crystal thin films

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A new technique using capillary action, capillary liquid epitaxial (CLE) technique, is described for growing a high-quality LiNbO3 thin film onto a LiTaO3 substrate. A LiTaO3 single-crystal film, 2 μm in thickness, was also successfully grown with good epitaxy onto a LiNbO3 substrate by this technique. Evaluation of these films by x-ray measurements and preliminary experimental results on optical waveguide are reported.