Journal
MATERIALS RESEARCH EXPRESS
Volume 2, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/2/5/055009
Keywords
sol-gel; silica glass; gold nanoparticles; nonlinear optics
Categories
Funding
- Fonds Europeen de Developpement Economique Regional
- Labex CEMPI and Equipex FLUX through the 'Programme Investissements d'Avenir'
- ANR (French National Research Agency) [JCJC SIMI 9- AMPEROR]
- Conseil Regional du Nord-Pas de Calais
- European Regional Development Fund (ERDF)
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Anew approach to dope a silica glass with gold nanoparticles (GNPs) is presented. It consisted in embedding zirconia-coated GNPs in a silica sol to form a doped silica gel. Then, the sol-doped nanoporous silica xerogel is densified leading to the formation of a glass monolith. The spectral position and shape of the surface plasmon resonance (SPR) reported around 520 nm remain compatible with small spherical GNPs in a silica matrix. The saturable absorption behavior of this gold/zirconia-doped silica glass has been evidenced by Z-scan technique. A second-order nonlinear absorption coefficient beta of about-13.7 cm GW(-1) has been obtained at a wavelength near the SPR of the GNPs.
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