Figure 3
From: Investigation of mechanism: spoof SPPs on periodically textured metal surface with pyramidal grooves
(a) The dispersion curves of SSPPs supported by the waveguides with pyramidal grooves that have N (N > 2) layers. (b) Dispersion relations for the waveguides with upright pyramidal grooves which have 6 layers as the groove depth varies. The groove depth varies from 10d to 0.8d. The curves and symbols correspond to analytical and simulated results, respectively.
