Fundamental bounds on extraordinary transmission with experimental validation
Research output: Book/Report › Report
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.
|Publisher||Electromagnetic Theory Department of Electrical and Information Technology Lund University Sweden|
|Number of pages||19|
|Publication status||Published - 2018 Oct 22|
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2014/01/01 → 2019/12/31