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Measured reflectivity as a function of frequency (circles) for (a) -polarized and (b) -polarized incident plane wave radiation at , . Also shown are the predictions of a finite element model (solid line). (a) Inset: a schematic of the experimental sample. (b) Inset: the resonant frequency of the first five modes supported by the sample plotted as a function of in-plane momentum .
Measured reflectivity as a function of azimuth angle for (a) -polarized and (b) -polarized incident radiation at . Light areas correspond to high reflection while dark areas correspond to strong absorption. Also shown are the diffracted light lines (dotted lines) arising from [1,0], [0,1], and [1,1] scatterings.
(i)–(iv) show the time averaged electric field strength on resonance for modes , , , and , respectively. Field strengths are calculated at and .
(a) -field and (b) -field magnitude (normalized to an incident -field of unity) as a function of distance through the unit cell along a line parallel to the -axis passing midway between the patch and ground plane at (patch center). Fields are calculated at a phase corresponding to the maximum enhancement at the fundamental resonant frequency of the structure for .
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