Fundamental bounds on extraordinary transmission with experimental validation

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Abstract

This paper presents a study of extraordinary transmission (EoT) through arrays of sub-wavelength apertures. Fundamental limitations for this phenomenon are formulated as a sum rule, relating the transmission coefficient over a bandwidth to the static polarizability. The sum rule is rigorously derived for arbitrary periodic apertures in thin screens. By this sum rule we establish a physical bound on the bandwidth of EoT which is verified numerically for a number of aperture array designs. We utilize the sum rule to design and optimize sub-wavelength frequency selective surfaces with a bandwidth close to the physically attainable. Finally, we verify the sum rule and simulations by measurements of an array of horseshoe-shaped slots milled in aluminum foil.

Details

Authors
Organisations
External organisations
  • KTH Royal Institute of Technology
  • Linnaeus University
  • TICRA A/S
Original languageEnglish
PublisherElectromagnetic Theory Department of Electrical and Information Technology Lund University Sweden
Number of pages19
Volume7263
Publication statusPublished - 2018 Oct 22
Publication categoryResearch

Publication series

NameTEAT-7263

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