Figure 3
From: High-efficiency chirality-modulated spoof surface plasmon meta-coupler
Designs of the artificial plasmonic metal supporting both TE and TM polarized SPPs. (a) Sample picture of the plasmonic metal composed by anisotropic mushroom-like structure (sized 7 × 7 mm2) array a flat metal mirror separated by a 2 mm thick dielectric spacer with b 1 = 1.5 mm, b 2 = 2.4 mm, l 1 = l 2 = 4 mm. (b) FEM simulated (solid line) and measured (open stars) dispersion relations of TE (red) and TM (blue) polarized spoof SPP modes for the mushroom-like plasmonic metal shown in (a). The thickness of the dielectric spacer is 2 mm and the width of the metallic wire is 0.5 mm.
