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Epitaxial Growth And Optical Properties of Sol-Gel (Pb,La)Ti03 Thin Films for Waveguides

Published online by Cambridge University Press:  15 February 2011

Junmo Koo ,
Changho Lee ,
Kwangsoo No  and
Byeong-Soo Bae
Junmo Koo
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology(KAIST), Taejon, 305–701, Korea, bsbae@sorak.kaist.ac.kr
Changho Lee
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology(KAIST), Taejon, 305–701, Korea, bsbae@sorak.kaist.ac.kr
Kwangsoo No
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology(KAIST), Taejon, 305–701, Korea, bsbae@sorak.kaist.ac.kr
Byeong-Soo Bae
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology(KAIST), Taejon, 305–701, Korea, bsbae@sorak.kaist.ac.kr
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Abstract

Lead lanthanum titanate thin films have been prepared on MgO and sapphire substrates by sol-gel method. XRD analyses confirm that the PLT films fabricated on MgO(lOO) and c-plane sapphire substrates grow preferentially with (100) and (111) orientations, respectively. The PLT films with a high La content have a low refractive index due to the decrease of the refractive index anisotropy. The propagation losses in PLT films measured, using He-Ne laser light and the prism coupling method decrease as the La content increases. This is due to the reduction of the refractive index anisotropy and the surface scattering by the surface roughness as a function of La content in the film.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 474: Symposium L – Epitaxial Oxide Thin Films III , 1997 , 61
Copyright
Copyright © Materials Research Society 1997

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References

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