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Proceedings Paper

Second harmonic generation from bulk glassceramics containing laser-poled dielectric nanocrystals
Author(s): A. Paleari; S. Brovelli; R. Lorenzi; N. Chiodini; G. Spinolo
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Paper Abstract

Silica glass with SnO2 nanocrystals, obtained from sol-gel synthesis and thermal densification at 1100 °C, was poled by means of a two-step process consisting of infrared 1064 nm laser irradiation followed by 532 nm laser exposure in high-voltage static electric field. Maker fringe experiments were then carried out at 1064 nm. The results show the formation of second-order nonlinearity with macroscopic nonlinear thickness (about 1 mm) and nonlinear susceptibility comparable with thermally poled silica (about 0.1 pm/V). Photoluminescence measurements suggest that mechanisms for this process should involve the activation and anisotropic ionization of defects at the interface between nanocrystals and glass.

Paper Details

Date Published: 8 May 2007
PDF: 8 pages
Proc. SPIE 6582, Nonlinear Optics and Applications II, 65820P (8 May 2007); doi: 10.1117/12.722833
Show Author Affiliations
A. Paleari, Univ. degli Studi di Milano-Bicocca (Italy)
S. Brovelli, Univ. College London (United Kingdom)
R. Lorenzi, Univ. degli Studi di Milano-Bicocca (Italy)
N. Chiodini, Univ. degli Studi di Milano-Bicocca (Italy)
G. Spinolo, Univ. degli Studi di Milano-Bicocca (Italy)

Published in SPIE Proceedings Vol. 6582:
Nonlinear Optics and Applications II
Mario Bertolotti, Editor(s)

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