Plasmonic resonances in ordered and disordered aluminum nanocavities arrays

Nanocavities arrays were synthesized by electrochemical anodization of aluminum using oxalic and phosphoric acids as electrolytes. The morphology and topography of these structures were evaluated by SEM and AFM. Plasmonic properties of Al cavities arrays with different ordering and dimensions were a...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-01, Vol.792 (1), p.12077
Main Authors: Campuzano, R. G., Mendoza, D.
Format: Article
Language:English
Subjects:
Aluminum
Arrays
Electrolytes
Morphology
Oxalic acid
Phosphoric acid
Physics
Plasmonics
Plasmons
Reflectance
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Summary:Nanocavities arrays were synthesized by electrochemical anodization of aluminum using oxalic and phosphoric acids as electrolytes. The morphology and topography of these structures were evaluated by SEM and AFM. Plasmonic properties of Al cavities arrays with different ordering and dimensions were analysed based on specular reflectivity. Al cavities arrays fabricated with phosphoric acid dramatically reduced the optical reflectivity as compared with unstructured Al. At the same time pronounced reflectivity dips were detectable in the 300nm-400nm range, which were ascribed to (0,1) plasmonic mode, and also a colored appearance in the samples is noticeably depending on the observation angle. These changes are not observed in samples made with oxalic acid and this fact was explained, based on a theoretical model, in terms that the surface plasmons are excited far in the UV range.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/792/1/012077