Figure 4.


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Distributions of the electric flux density Dz at z = 1 μm and surface current Jsurf on the metasurface for the incidence of the LCP waves from the front (z > 0) or back (z < 0) sides of the metasurface structure at 0.504 THz: (a) Zs/Z0 = 25 with front-side incidence; (b) Zs/Z0 = 25 with back-side incidence; (c) Zs/Z0 = 0.01 with front-side incidence; (d) Zs/Z0 = 0.01 with back-side incidence. The color maps and arrows in green indicate Dz and the surface current vector, respectively. For clarity, the phase of Dz is shifted by π/2 relative to Jsurf.

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