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Evaluation of the third-order optical nonlinearity of Au:SiO2 nanocomposites in the off-resonant spectral region
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2013 (English)In: Optics Communications, ISSN 0030-4018, E-ISSN 1873-0310, Vol. 286, 347-352 p.Article in journal (Refereed) Published
Abstract [en]

The third-order nonlinear optical susceptibility (chi((3))) of Au:SiO2 nanocomposite films with different Au particle sizes was measured to be on the order of 10(-10) esu to 10(-9) esu in the off-resonant spectral region, and the particle size-dependent behavior of chi((3)) was observed. The results were found to deviate substantially from those of the conventional Maxwell-Garnet theory. By adapting the modified invariant imbedding method, which takes into account the effect of interparticle interactions on the nonlinear response, we successfully explain the enhanced third-order nonlinear susceptibility of metal-dielectric nanocomposites at off-resonant wavelengths.

Place, publisher, year, edition, pages
2013. Vol. 286, 347-352 p.
Keyword [en]
Nanocomposite, Au:SiO2, Nonlinear refraction, Nonlinear absorption, Invariant imbedding method
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URN: urn:nbn:se:kth:diva-116420DOI: 10.1016/j.optcom.2012.09.009ISI: 000312469900065Scopus ID: 2-s2.0-84868193572OAI: oai:DiVA.org:kth-116420DiVA: diva2:589933
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QC 20130121

Available from: 2013-01-21 Created: 2013-01-18 Last updated: 2017-12-06Bibliographically approved

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Pasiskevicius, Valdas

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