Planarization of Lithium Niobate Surface Using a Thin Film Catalyst in Pure WaterPho Van Bui, Daisetsu Toh, Masahiko Kanaoka, Hiromi Okada, Satoshi Matsuyama, Kazuto Yamauchi and Yasuhisa SanoEPJ Web Conf., 266 (2022) 03006DOI: https://doi.org/10.1051/epjconf/202226603006