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Phys Rev Lett. 2003 Feb 7;90(5):055507. Epub 2003 Feb 6.

Photorefractivity in nanostructured tin-silicate glass ceramics: a radiation-induced nanocluster size effect.

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  • 1Istituto Nazionale Fisica della Materia - Department of Material Science, University of Milano-Bicocca, via Cozzi 53, Italy.

Abstract

The possibility of obtaining permanent photoinduced refractive index changes, up to -10(-3), in nanostructured silica-based composites has been demonstrated in SiO(2):SnO(2) optical-grade glass ceramics exposed to ultraviolet radiation. Optical and electron paramagnetic resonance data suggest that the negative refractive index change involves a modification at the surface of the SnO2 nanoclusters, leading to a reduction of their crystalline size.

PMID:
12633373
[PubMed]
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