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Transmission electron microscopy observation and optical property of sol-gel derived LiNbO3 films

Published online by Cambridge University Press:  31 January 2011

K. Terabe ,
A. Gruverman ,
Y. Matsui ,
N. Iyi  and
K. Kitamura
K. Terabe
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1–1, Tsukuba-shi, Ibaraki 305, Japan
A. Gruverman
Affiliation:
National Institute for Advanced Interdisciplinary Research, Higashi 1–1-4, Tsukuba-shi, Ibaraki 305, Japan
Y. Matsui
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1–1, Tsukuba-shi, Ibaraki 305, Japan
N. Iyi
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1–1, Tsukuba-shi, Ibaraki 305, Japan
K. Kitamura
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1–1, Tsukuba-shi, Ibaraki 305, Japan
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Abstract

Crystallization behavior, defects, and interface structures of sol-gel derived LiNbO3 films on three kinds of substrates were examined. The nucleation was found to occur epitaxially at the interface between the film and the substrate. The continuous film is formed by coalescence of the island-like crystallites. When sapphire substrate is used, which has large lattice mismatch with the LiNbO3, the resulting film contains a large amount of micropores, twin structures, and misfit dislocations. On the other hand, while LiTaO3 and 5% MgO-doped LiNbO3 substrates with smaller mismatch are used as substrates, the films show no evidence of the formation of dislocations and twins. The film on 5% MgO-doped LiNbO3 substrate shows better optical waveguiding property.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 12 , December 1996 , pp. 3152 - 3157
Copyright
Copyright © Materials Research Society 1996

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References

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