Figure 1
From: High-order localized spoof surface plasmon resonances and experimental verifications
(a) Normalized scattering cross section of textured perfect conducting 2D cylinders as a function of the frequency and the ratio (R − r)/R. The geometrical parameters are set as R = 25 mm and a = 0.5d. (b) Normalized scattering cross section as function of the frequency and a/d. The geometrical parameters are set as R = 25 nm and r = 2 nm. The left sketch and insets show the geometric parameters of the structure. The blue and green dots are plotted using Eq. (3)
