Unity absorbance layers - optimal design criteria

Details Unity absorbance layers - optimal design criteria Unity absorbance layers - optimal design criteria

2011-01-14

arxiv.org/abs/1101.2856v1

Proceedings of the Fourth International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (13th-18th Sep

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 1 figure, conference paper

Scientific paper

We present the necessary and sufficient conditions for the unity absorbance of thin planar layers. With a simple structure comprising a double-layer grid, it is shown that zero transmission and reflection is feasible only if the second sheet is a perfectly conducting wall. The operational frequencies can be varied by tuning the grid impedance. Explicit conditions are given at the large wavelength limit; these underline the fundamental of ultra-thin perfect antennae and absorbers.

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