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Large third-order nonlinear refractive index coefficient based on gold nanoparticle aggregate films
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2015 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 107, no 14, article id 141111Article in journal (Refereed) Published
Abstract [en]

Au nanoparticles show large third-order nonlinear effect and ultra-fast response. Here a high nonlinear aggregate film based on self-assembled gold nanoparticles is reported and its third-order nonlinear refractive index coefficient is measured by Z-scan experiment. The third-order nonlinear refractive index coefficient of the Au nanoparticle aggregate film (gamma(1) = 9.2 x 10(-9) cm(2)/W) is found to be larger than that of an 8-nm-thick sputtered Au film (gamma(2)= 6.5 x 10(-9) cm(2)/W). This large nonlinear effect can be attributed to the strong field enhancement due to localized plasmon resonances between Au nanoparticles. The result shows that the self-assembled Au nanoparticle aggregate film could be a promising candidate as a third-order nonlinear optical material.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2015. Vol. 107, no 14, article id 141111
Keyword [en]
Au Triangular Nanoprism, Z-Scan Measurement, Optical Properties, Plasmon Resonance, Arrays, Dipole, Sers
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-176967DOI: 10.1063/1.4931759ISI: 000363422100011Scopus ID: 2-s2.0-84943760162OAI: oai:DiVA.org:kth-176967DiVA: diva2:883048
Note

QC 20151216

Available from: 2015-12-16 Created: 2015-11-13 Last updated: 2017-12-01Bibliographically approved

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