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Ferroelectic BaTiO3 Thin Film Optical Waveguide Modulators

Published online by Cambridge University Press:  17 March 2011

A. Petraru ,
M. Siegert ,
M. Schmid ,
J. Schubert  and
Ch. Buchal
A. Petraru
Affiliation:
Institut für Schichten und Grenzflächen (ISG1-IT), Forschungszentrum, D- 52425 Jülich, Germany
M. Siegert
Affiliation:
Institut für Schichten und Grenzflächen (ISG1-IT), Forschungszentrum, D- 52425 Jülich, Germany
M. Schmid
Affiliation:
Institut für Schichten und Grenzflächen (ISG1-IT), Forschungszentrum, D- 52425 Jülich, Germany
J. Schubert
Affiliation:
Institut für Schichten und Grenzflächen (ISG1-IT), Forschungszentrum, D- 52425 Jülich, Germany
Ch. Buchal
Affiliation:
Institut für Schichten und Grenzflächen (ISG1-IT), Forschungszentrum, D- 52425 Jülich, Germany, - email: c.buchal@fz-juelich.de
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Abstract

High quality BaTiO3 epitaxial thin films on MgO substrates have been grown by pulsed laser deposition (PLD). Both c-axis and a-axis orientated BaTiO3 were studied. Mach-Zehnder (M-Z) optical waveguide modulators have been fabricated by ion beam etching. The BaTiO3 waveguide propagation losses are 1-2 dB/cm. Electro-optic modulation has been demonstrated with Vπ = 6.3 V at a wavelength of 633 nm and Vπ = 9.5 V at a wavelength of 1550 nm for the aaxis samples and with Vπ = 8 V at 633 nm wavelength and Vπ = 15 V at 1550 nm for the c-axis samples. Modelling of the modulators gave the Pockels coefficient r51 = 80 pm/V for the c-axis film and an effective Pockels coefficient reff =734pm/V for the a-axis films at 633nm wavelength.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 688: Symposium C – Ferroelectric Thin Films X , 2001 , C8.1.1
Copyright
Copyright © Materials Research Society 2002

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References

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