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Proceedings Paper

Structure of sol-gel-derived PbO-TiO2 amorphous monoliths with high third-order optical nonlinearity
Author(s): Hiroyuki Nasu; Kanichi Kamiya; Yuji Katagiri; Seitaro Makino; Jun Matsuoka
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Paper Abstract

The PbO-TiO2 amorphous monoliths with TiO2 content from 60 to 80 mol% were prepared by the sol-gel method. The amorphous monoliths obtained were somewhat porous, but had a high refractive index of more than 2.0. The third-order optical nonlinear susceptibility, (Chi) (3), of them evaluated from third-harmonic generation (THG) was 5.7 X 10-13 esu for the transparent monolith containing 60 mol% TiO2, and increased with increasing TiO2 content. The largest (Chi) (3) was 1.4 X 10-12 esu, for the monolith with 80 mol% TiO2. Ti-K edge x-ray absorption (XANES and EXAFS) analyses were carried out for gels and heat-treated monoliths. XANES spectra of Ti were very similar to that of crystalline PbTiO3 in which Ti is coordinated with six oxygen atoms. Similarly, EXAFS analysis on the basis of Fourier transformation and double-shell fitting method revealed sixfold Ti atoms both in the heated products and even in gels.

Paper Details

Date Published: 13 October 1994
PDF: 10 pages
Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); doi: 10.1117/12.188977
Show Author Affiliations
Hiroyuki Nasu, Mie Univ. (Japan)
Kanichi Kamiya, Mie Univ. (Japan)
Yuji Katagiri, Mie Univ. (Japan)
Seitaro Makino, Mie Univ. (Japan)
Jun Matsuoka, Mie Univ. (Japan)

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

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