Light absorber with an ultra-broad flat band based on multi-sized slow-wave hyperbolic metamaterial thin-films
2014 (English)In: Progress In Electromagnetics Research, ISSN 1070-4698, E-ISSN 1559-8985, Vol. 147, 69-79 p.Article in journal (Refereed) Published
Here we realize a broadband absorber by using a hyperbolic metamaterial composed of alternating aluminum-alumina thin films based on superposition of multiple slow-wave modes. Our super absorber ensures broadband and polarization-insensitive light absorption over almost the entire solar spectrum, near-infrared and short-wavelength infrared regime (500-2500 nm) with a simulated absorption of over 90%. The designed structure is fabricated and the measured results are given. This absorber yields an average measured absorption of 85% in the spectrum ranging from 500nm to 2300 nm. The proposed absorbers open an avenue towards realizing thermal emission and energy- harvesting materials.
Place, publisher, year, edition, pages
2014. Vol. 147, 69-79 p.
Terahertz Regime, Absorption, Design, Slab
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-161026DOI: 10.2528/PIER14040306ISI: 000350673700005ScopusID: 2-s2.0-84903515906OAI: oai:DiVA.org:kth-161026DiVA: diva2:794875
FunderSwedish Research Council, 621-2011-4620
QC 201503132015-03-132015-03-062015-04-07Bibliographically approved