Preparation and optical properties of gold-dispersed BaTiO3 thin films by sol-gel process

Tohru Kineri; Emi Matano; Toshio Tsuchiya

doi:10.1117/12.188945

13 October 1994 Preparation and optical properties of gold-dispersed BaTiO₃ thin films by sol-gel process

Tohru Kineri, Emi Matano, Toshio Tsuchiya

Proceedings Volume 2288, Sol-Gel Optics III; (1994) https://doi.org/10.1117/12.188945
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Tohru Kineri, Emi Matano, and Toshio Tsuchiya "Preparation and optical properties of gold-dispersed BaTiO₃ thin films by sol-gel process", Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); https://doi.org/10.1117/12.188945

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