Excitation of plasmons in self-ordered arrays of aluminum and silver nanoconcaves within UV-IR spectral range

Large-scale hexagonally aluminum nanoconcave arrays were synthesized by electrochemical anodization of aluminum using oxalic acid and mixtures of phosphoric acid and citric acid; which, in turn, were used as nanostructured substrates to control the plasmonic resonances of silver. Plasmonic propertie...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-06, Vol.1221 (1), p.12001
Main Authors: González-Campuzano, R, Mendoza, D
Format: Article
Language:English
Subjects:
Aluminum
Arrays
Citric acid
Nanostructure
Oxalic acid
Phosphoric acid
Physics
Plasmonics
Plasmons
Reflectance
Silver
Substrates
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Summary:Large-scale hexagonally aluminum nanoconcave arrays were synthesized by electrochemical anodization of aluminum using oxalic acid and mixtures of phosphoric acid and citric acid; which, in turn, were used as nanostructured substrates to control the plasmonic resonances of silver. Plasmonic properties of both systems were investigated based on specular reflectivity in the ultraviolet-visible-infrared range. We found that their optical reflectance was dramatically reduced as compared with unstructured films deposited by thermal evaporation that were used as references. At the same time pronounced reflectance dips were detectable in the 262-1077 nm wavelength range, which were ascribed to plasmonic resonances of first and higher orders. We propose that the use of nanostructured aluminum as a substrate can be extended for the control of plasmonic properties of other metals.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1221/1/012001