Abstract
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.