TY - GEN
T1 - Domain switching performance of stoichiometric LiTa03 for bulk quasi-phase matching devices
AU - Kitamura, Kenji
AU - Furukawa, Yasunori
AU - Takekawa, Shunji
AU - Hatanaka, Takaaki
AU - Ito, Hiromasa
AU - Gopalan, Verkatraman
N1 - Publisher Copyright:
© 1999 Optical Society of America.
PY - 2000
Y1 - 2000
N2 - We grew near stoichiometric LiTaO3 crystal from a Li-rich melt using a novel double crucible Czocbralski method. The ferroelectric domain shape and domain wall smoothness were compared between the conventional and near stoichiometric LiTaO3 crystals. It turned out that the domain shape under the electric field at room temperature strongly depended on the densities of nonstoichometric defects. The domain shape in the conventional LiTaO3 is basically triangular while it is hexagonal in the stoichiometric LiTaO3. The sides of hexagon in the stoichiometric LiTaO3 are perpendicular to the crystallographical X axes, that is, parallel to the X faces. Therefore, considerably smooth domain walls can be obtain in the stoichiometric LiTaO3 when the periodical domain structure is designed as each domain elongates along the Y axis. This result is promising a great improvement by using stoichiometric LiTaO3 in fabricating quasi-phase matching wavelength conversion devices with high performances.
AB - We grew near stoichiometric LiTaO3 crystal from a Li-rich melt using a novel double crucible Czocbralski method. The ferroelectric domain shape and domain wall smoothness were compared between the conventional and near stoichiometric LiTaO3 crystals. It turned out that the domain shape under the electric field at room temperature strongly depended on the densities of nonstoichometric defects. The domain shape in the conventional LiTaO3 is basically triangular while it is hexagonal in the stoichiometric LiTaO3. The sides of hexagon in the stoichiometric LiTaO3 are perpendicular to the crystallographical X axes, that is, parallel to the X faces. Therefore, considerably smooth domain walls can be obtain in the stoichiometric LiTaO3 when the periodical domain structure is designed as each domain elongates along the Y axis. This result is promising a great improvement by using stoichiometric LiTaO3 in fabricating quasi-phase matching wavelength conversion devices with high performances.
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M3 - Conference contribution
AN - SCOPUS:85134560656
T3 - Optics InfoBase Conference Papers
SP - 321
EP - 323
BT - Advanced Solid State Lasers, ASSL 2000
PB - Optica Publishing Group (formerly OSA)
T2 - Advanced Solid State Lasers, ASSL 2000
Y2 - 13 February 2000
ER -