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Bragg Reflector Waveguide and Electro-Optic Modulator Based on Barium Titanate Epitaxial Thin Films

Published online by Cambridge University Press:  01 February 2011

Zhifu Liu ,
Pao-Tai Lin  and
Bruce W. Wessels
Zhifu Liu
Affiliation:
[email protected], Northwestern University, Materials Science and Engineering and Materials Research Center, 2220 Campus Drive, Evanston, IL, 60208, United States, 847-491-7797
Pao-Tai Lin
Affiliation:
[email protected], Northwestern University, Materials Science and Engineering and Materials Research Center, 2220 Campus Drive, Evanston, IL, 60208, United States
Bruce W. Wessels
Affiliation:
[email protected], Northwestern University, Materials Science and Engineering and Materials Research Center, 2220 Campus Drive, Evanston, IL, 60208, United States
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Abstract

We report the nanofabrication of Bragg reflector waveguide structure based on barium titanate (BTO) epitaxial thin film grown on MgO substrate and characterized its optical transmission. A low pressure (~1 Torr) nano-lithography was used for the formation of Bragg reflector waveguide structure. We demonstrate that there is sufficient refractive index contrast to form a well-defined stop band by forming gratings in a top strip layer of Si3N4 that was grown on BTO thin film. Simulation of the optical transmission and stop band of TE mode, and electro-optic (EO) modulator tunability are discussed as well. The non-linear photonic crystal waveguides are potentially suitable as tunable optical filters and ultra-wide bandwidth modulators.

Keywords

nanostructureoptoelectronicthin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1014: Symposium AA – Three-Dimensional Nano- and Microphotonics , 2007 , 1014-AA07-01
Copyright
Copyright © Materials Research Society 2007

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