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Characterization of Lithium Niobate Thin Films Derived from Aqueous Solution
Author(s) -
Ono Satomi,
Böse Olaf,
Unger Wolfgang,
Takeichi Yoshikuni,
Hirano Shinichi
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02544.x
Subject(s) - lithium niobate , aqueous solution , crystallization , materials science , annealing (glass) , amorphous solid , sapphire , nucleation , thin film , lithium (medication) , chemical engineering , analytical chemistry (journal) , crystallography , composite material , optics , chemistry , nanotechnology , organic chemistry , optoelectronics , laser , physics , engineering , medicine , endocrinology
Lithium niobate (LiNbO 3 , LN) films prepared from aqueous precursor solutions were characterized, in terms of the hydroxyl contents on the surface layers through crystallization and optical properties. Approximately 98% of the hydroxyl residues on the surface layers of crystalline films were polymerized after heat treatment at 350° or 500°C, whereas 50% of the hydroxyl residues remained on the surface layers of amorphous films heat‐treated at 200°C. Highly preferred oriented LN films had a tendency to consist of in‐plane rotation by 60° during nucleation and crystallization. Optical losses (at 632.8 nm) were 2 dB/cm in the TE 0 mode and 4 dB/cm in the TM 0 mode of the LN films (thickness of 670 nm) on sapphire (001) substrates prepared from a neutralized precursor solution after annealing in oxygen at a temperature of 500°C (where TE and TM are the transverse electric and magnetic modes, respectively).