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Synthesis of tunable plasmonic metal-ceramic nanocomposite thin films by temporally modulated sputtered fluxes
Linkoping Univ, Dept Phys Chem & Biol IFM, Nanoscale Engn Div, SE-58183 Linkoping, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Linkoping Univ, Dept Phys Chem & Biol IFM, Plasma & Coatings Phys Div, SE-58183 Linkoping, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
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2017 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 121, no 17, 171918Article in journal (Refereed) Published
Abstract [en]

The scientific and technological interest for metal-dielectric nanocomposite thin films emanates from the excitation of localized surface plasmon resonances (LSPRs) on the metal component. The overall optical response of the nanocomposite is governed by the refractive index of the dielectric matrix and the properties of the metallic nanoparticles in terms of their bulk optical properties, size, and shape, and the inter-particle distance of separation. In order to tune the film morphology and optical properties, complex synthesis processes which include multiple steps-i. e., film deposition followed by post-deposition treatment by thermal or laser annealing-are commonly employed. In the present study, we demonstrate that the absorption resonances of Ag/AlOxNy nanocomposite films can be effectively tuned from green (similar to 2.4 eV) to violet (similar to 2.8 eV) using a single-step synthesis process that is based on modulating the arrival pattern of film forming species with sub-monolayer resolution, while keeping the amount of Ag in the films constant. Our data indicate that the optical response of the films is the result of LSPRs on isolated Ag nanoparticles that are seemingly shifted by dipolar interactions between neighboring particles. The synthesis strategy presented may be of relevance for enabling integration of plasmonic nanocomposite films on thermally sensitive substrates.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2017. Vol. 121, no 17, 171918
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-323028DOI: 10.1063/1.4979139ISI: 000400623700020OAI: oai:DiVA.org:uu-323028DiVA: diva2:1104914
Funder
Knut and Alice Wallenberg Foundation, 2015.0060
Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-06-02Bibliographically approved

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Melander, EmilKapaklis, Vassilios

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