Kirchhoff’s metasurfaces towards efficient photo-thermal energy conversion

Thermo-optical properties of the nanodisc and metal hole array plasmonic perfect absorber (PPA) metasurfaces were designed and characterized at mid-infrared wavelengths. Both, radiation emitter and detector systems operating in various spectral domains are highly sought after for a diverse range of...

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Bibliographic Details
Published in:Scientific reports 2019-06, Vol.9 (1), p.8284-8284, Article 8284
Main Authors: Nishijima, Yoshiaki, Balčytis, Armandas, Naganuma, Shin, Seniutinas, Gediminas, Juodkazis, Saulius
Format: Article
Language:English
Subjects:
639/301/357/354
639/925/927/1021
Design
Energy conversion
Heat
Humanities and Social Sciences
Internet of Things
multidisciplinary
Optical properties
Radiation
Science
Science (multidisciplinary)
Sensors
Silicon wafers
Spectrum analysis
Thermal energy
Wavelengths
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Summary:Thermo-optical properties of the nanodisc and metal hole array plasmonic perfect absorber (PPA) metasurfaces were designed and characterized at mid-infrared wavelengths. Both, radiation emitter and detector systems operating in various spectral domains are highly sought after for a diverse range of applications, one example being future sensor networks employed in the internet-of-things. Reciprocity of the absorbance and emittance is shown experimentally, i.e., the PPAs are demonstrated to follow Kirchhoff’s law where the patterns exhibiting a strong optical absorption were found to be effective thermal emitters. Hence, the Kirchhoff’s law is experimentally validated for the metasurfaces in the IR spectral domain where there is a lack of solutions for spectrally narrow-band emitters. The highest efficiency of radiation-to-heat and heat-to-radiation conversion was obtained for Au-Si-Au composite structures.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-44781-4