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Double-sided polarization-independent plasmonic absorber at near-infrared region
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO. State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China .
2013 (English)In: Optics Express, ISSN 1094-4087, Vol. 21, no 11, 13125-13133 p.Article in journal (Refereed) Published
Abstract [en]

A double-sided polarization-independent plasmonic absorber is proposed and numerically investigated. Distinct from previously studied absorbers, it could absorb light incident from both sides of the surface through an ultrathin three-layer metal-insulator-metal nanostructure. Patterned metal particles are adopted instead of metal films in this absorber. It shows a high absorbance over a wide incident-Angle range at near-infrared region. For electromagnetic waves incident from different sides of the structure, the maximum absorption locates at different wavelengths due to asymmetry. The effective medium theory demonstrates that the whole structure exhibits different impedances for both top and bottom incidences. This double-sided-Absorption characteristic could lead to potential applications in thermal emitters, sensing, etc.

Place, publisher, year, edition, pages
2013. Vol. 21, no 11, 13125-13133 p.
Keyword [en]
Absorbances, Effective medium theories, Light incident, Metal insulator metals, Metal particle, Near infrared region, Polarization-independent, Thermal emitter
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-134265DOI: 10.1364/OE.21.013125ISI: 000319814900017ScopusID: 2-s2.0-84878824330OAI: diva2:665874
Swedish Foundation for Strategic Research Swedish Research Council

QC 20131121

Available from: 2013-11-21 Created: 2013-11-20 Last updated: 2013-12-10Bibliographically approved

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