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Epitaxial KNbo3 and its Nonlinear Optical Properties

Published online by Cambridge University Press:  10 February 2011

Barbara M. Nichols ,
Bruce W. Wessels ,
John A. Belot  and
Tobin J. Marks
Barbara M. Nichols
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
Bruce W. Wessels
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
John A. Belot
Affiliation:
Department of Chemistry, Northwestern University, Evanston, IL 60208
Tobin J. Marks
Affiliation:
Department of Chemistry, Northwestern University, Evanston, IL 60208
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Abstract

The nonlinear optical properties of epitaxial KNbO3 were studied for films grown by metalorganic chemical vapor deposition on different substrates. X-ray diffraction revealed epitaxial KNbO3 with a (110) orientation for layers deposited on single crystal strontium titanate. Whereas, films grown on (100) spinel exhibited a multi-variant structure, consisting of the (110) and (001) orientations. The volume fraction of each crystallographic variant in the film was calculated. Second harmonic generation measurements at 532 nm were performed to determine the ferroelectric domain variants present. The Maker-fringe technique was employed to obtain the effective nonlinear optical susceptibility of the films, which ranged from 0.1 - 1.8 pm/V. The SHG intensity profiles reveal a strong dependence upon substrate type.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 541: Symposium O – Ferroelectric Thin Films VII , 1998 , 741
Copyright
Copyright © Materials Research Society 1999

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References

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