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Sol-Gel Synthesis of BaTiO3 Based Films for Photonic Applications

Published online by Cambridge University Press:  10 February 2011

V. Fuflyigin ,
H. Jiang ,
F. Wang ,
P. Yip ,
P. Vakhutinsky  and
J. hao
V. Fuflyigin
Affiliation:
NZ Applied Technologies, Woburn, MA 1801, USA
H. Jiang
Affiliation:
NZ Applied Technologies, Woburn, MA 1801, USA
F. Wang
Affiliation:
NZ Applied Technologies, Woburn, MA 1801, USA
P. Yip
Affiliation:
NZ Applied Technologies, Woburn, MA 1801, USA
P. Vakhutinsky
Affiliation:
NZ Applied Technologies, Woburn, MA 1801, USA
J. hao
Affiliation:
NZ Applied Technologies, Woburn, MA 1801, USA
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Abstract

High quality barium titanate films were grown on (001)LaAlO3 and r-Al2O3 in a wide thickness range of 0.5-10 µtm by sol-gel technique. Significant improvement of the films' crystallinity and optical quality was observed if acetate precursors are used vs. alkoxide precursors, and in the presence of lead oxide. The material is transparent at 350-2000 nm, indicating the possibility of its application in light controlling devices at wavelengths used in optical communication: 1300 and 1500 nm. Maximum field induced relative phase shift of 0.22 radian was measured in the film with composition of Ba0.9Pb0.1TiO3 under a field strength of 3.106 V/cm.

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