Figure 7
From: High-order localized spoof surface plasmon resonances and experimental verifications
Normalized ECS spectrum for an ultrathin corrugated metallic disk with R = 25 mm, r = 2 mm, L = 0.018 mm, N = 60, d = 2.61 mm and a = 0.5d.
The right panels display the near electric-field distributions on the x-y plane which is 1.5 mm above the upper surface of the disk at the resonant frequencies, corresponding to the second-order hexa-, octo-, deca-, dodeca-, tetradeca- and hexadecapole modes, respectively.
