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Proceedings Paper

Preparation and optical properties of gold-dispersed BaTiO3 thin films by sol-gel process
Author(s): Tohru Kineri; Emi Matano; Toshio Tsuchiya
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Paper Abstract

Gold-dispersed BaTiO3 thin films, which will be used for third-order nonlinear optical devices, were prepared by sol-gel method with spin-coating using HAuCl4 (DOT) 4H2O, Ba(CH3COO)2 and Ti [O(CH2)3CH3]4 as starting materials. The thin films were heat-treated in air at temperatures ranging from 400 degree(s)C to 800 degree(s)C for 1 h. Thin films with different volume fractions of fine gold particles were successfully prepared. The peak position of the surface plasmon resonance of gold particles shifted toward the long wavelength as the heat-treatment temperature and the volume fraction of gold increased. The BaTiO3 matrix was amorphous up to 400 degree(s)C, but became crystallized at temperatures above 500 degree(s)C. The fine gold particles became coarse between 600 degree(s)C and 800 degree(s)C. The mean particle size of gold was 20 nm at 800 degree(s)C. The nonlinear optical property of these thin films was measured by the degenerate four-wave mixing (DFWM) method using a frequency-doubled Nd:YAG laser with 20 ps pulse duration. Third-order nonlinear susceptibility (Chi) (3) of gold-dispersed BaTiO3 thin film with 10 vol% of gold was 2.5 X 10-8 esu.

Paper Details

Date Published: 13 October 1994
PDF: 6 pages
Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); doi: 10.1117/12.188945
Show Author Affiliations
Tohru Kineri, TDK Corp. (Japan)
Emi Matano, Science Univ. of Tokyo (Japan)
Toshio Tsuchiya, Science Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 2288:
Sol-Gel Optics III
John D. Mackenzie, Editor(s)

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