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Near-infrared broadband absorber with film-coupled multilayer nanorods
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2013 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 38, no 13, 2247-2249 p.Article in journal (Refereed) Published
Abstract [en]

Turning the surfaces of noble metals (metasurfaces) into black (highly absorptive) surfaces can be potentially applied in thermophotovoltaics, sensing, tailoring thermal emissivity, etc. Here we demonstrate an extremely broadband absorber for the 900-1600 nm wavelength range with robust high absorption efficiency. The inexpensive droplet evaporation method is implemented to create patterns of nanoparticles dispersed on a gold film spaced by a thin dielectric layer. The diversity of the complicated random stacking of the chemically synthesized gold nanorods is the major factor for the broad absorption band. Such a metamaterial absorber may pave the way for cost-effective manufacture of large-area black metasurfaces.

Place, publisher, year, edition, pages
Optical Society of America, 2013. Vol. 38, no 13, 2247-2249 p.
Keyword [en]
Total Absorption, Gold Nanorods, Light, Surfaces, Gratings
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-124968DOI: 10.1364/OL.38.002247ISI: 000321262500029Scopus ID: 2-s2.0-84879667994OAI: oai:DiVA.org:kth-124968DiVA: diva2:638924
Funder
Swedish Foundation for Strategic Research Swedish Research Council
Note

QC 20130805

Available from: 2013-08-05 Created: 2013-08-02 Last updated: 2017-12-06Bibliographically approved

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