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Preparation and enhancement of second-order nonlinearity of hybrid PMMA/SiO2 glass with Sb2S3 nanocrystals

Published online by Cambridge University Press:  31 January 2011

Qiming Liu ,
Wei Zhou ,
Xinmiao Lu ,
Ting Hu  and
Xiujian Zhao
Qiming Liu*
Affiliation:
Key Laboratory of Silicate Materials Science and Engineering, Wuhan University of Technology, Ministry of Education, Wuhan, Hubei 430070, China
Xiujian Zhao
Affiliation:
Key Laboratory of Silicate Materials Science and Engineering, Wuhan University of Technology, Ministry of Education, Wuhan, Hubei 430070, China
*
a) Address all correspondence to this author. e-mail: qmliu@whut.edu.cn
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Abstract

Bulk hybrid polymethyl methacrylate (PMMA)/SiO2 glass with Sb2S3 nanocrystals was prepared by the sol-gel process. We tried to minimize the quantity of water as much as possible in tetraethyl orthosilicate (TEOS) hydrolyzing, prepolymerized the organic monomers, mixed inorganic precursors, and prepolymerized organic monomers under a noncosolvent condition to reduce possible volume shrinkage. A silane coupling agent, which hydrolyzed simultaneously with TEOS, was introduced into the system to improve the miscibility of the organic and inorganic materials. The maximum dopant of Sb2S3 was 9 wt% in our experiments. The second-harmonic generation was observed in the hybrid PMMA/SiO2 glasses with electron-beam poling. Second-harmonic intensity increased with increase of accelerating voltage, current, and the content of Sb2S3 nanocrystals. The maximum χ2 in our study, as large as 1.64 p.m./V, was obtained under the optimized poling condition conducted at 25 kV, 20 nA, and 10 min. It was indicated from the thermally stimulated depolarization current measurements that the nonlinear layer was located in the thin 10-μm irradiated surface of the glass.

Keywords

Sol-gel
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 8 , August 2009 , pp. 2555 - 2560
Copyright
Copyright © Materials Research Society 2009

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