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Exciting multiple plasmonic resonances by a double-layered metallic nanostructure
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2011 (English)In: Journal of the Optical Society of America. B, Optical physics, ISSN 0740-3224, E-ISSN 1520-8540, Vol. 28, no 11, 2827-2832 p.Article in journal (Refereed) Published
Abstract [en]

By placing a metallic layer of a periodic nanostrip array above a metallic layer of a periodic nanogroove array with a separation of 120nm, we obtain a triple-band thin film absorber with all its resonant wavelengths displaying absorptivity greater than 90%. Through a systematic study of the current compound structure, we find these three absorption peaks mainly depend on some simple resonances, i.e., the modes supported by the nanostrip array in the top layer, the nanogroove array in the bottom layer, and the horizontal cavity between the two layers. In addition, we show that this kind of absorber is quite robust and fairly insusceptible to the parallel shift between the two different layers. This study should contribute to the design of thin film absorbers/ emitters.

Place, publisher, year, edition, pages
2011. Vol. 28, no 11, 2827-2832 p.
Keyword [en]
NANOCAVITY ANTENNA; LIGHT; TRANSMISSION; GRATINGS; ABSORPTION; APERTURES; NANOSLIT
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-50317ISI: 000296710300034Scopus ID: 2-s2.0-80155140356OAI: oai:DiVA.org:kth-50317DiVA: diva2:480319
Note
QC 20120119Available from: 2012-01-19 Created: 2011-12-05 Last updated: 2017-12-08Bibliographically approved

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He, Sailing

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