Schematic illustration of a metamaterial with two azimuthal layers of rectangular holes. Φ is the distribution angle and the orientation angle of each rectangular aperture with respect to x axis is ϕ.
The magnitude of α versus the distribution angle Φ. The black line and the red diamonds are the results from Eq. (3) and from FDTD simulation, respectively. Inset shows the distribution of electric field intensity for a right-handed circularly polarized incidence at Φ = 90°.
The magnitude of α versus the distribution angle Φ, for varied radius (blue triangles) and fixed radius (red triangles), respectively. These two structures are identical with each other when Φ = 90°.
The distributions of for (a) linear and (c) right-handed circularly polarized incidences, respectively. The frame of the metamaterial structure is shown in the background. Plots (b) and (d) show the distributions of , where dark lines represent the contour of .
The distributions of the transverse energy flow density (white arrows) at (a) to (i) with a interval of 0.5 a for a incidence. The distribution of is shown as color map, and the frame of the structure is shown in the background.
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