Honeycomb-lattice plasmonic absorbers at NIR: anomalous high-order resonance
2013 (English)In: Optics Express, ISSN 1094-4087, Vol. 21, no 18, 20873-20879 p.Article in journal (Refereed) Published
We design, fabricate and characterize a plasmonic honeycomb lattice absorber with almost perfect absorption at 1140 nm over a wide incident angle range. This absorber also possesses a narrow-band, angle-and polarization-dependent high-order resonance in the short-wavelength range, with a bandwidth of 19 nm and angle sensitivity of 3 nm per degree. The nature of this high-order absorption band is analyzed through finite-element simulations. We believe it is due to Bragg coupling of the incident light to the backward-propagating surface plasmon polariton through the periodic modulation of the structure. Such fine absorption bands can find applications in plasmonic sensors and spectrally selective thermal emitters.
Place, publisher, year, edition, pages
2013. Vol. 21, no 18, 20873-20879 p.
Electromagnetic wave polarization, Honeycomb structures, Surface plasmon resonance
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-132209DOI: 10.1364/OE.21.020873ISI: 000324867100053ScopusID: 2-s2.0-84884575313OAI: oai:DiVA.org:kth-132209DiVA: diva2:659249
FunderSwedish Foundation for Strategic Research Swedish Research Council
QC 201310242013-10-242013-10-242014-02-03Bibliographically approved