Figure 4
From: Investigation of mechanism: spoof SPPs on periodically textured metal surface with pyramidal grooves
The dispersion curves of SSPPs in the waveguide with irregular pyramidal grooves that have 6 layers.
The solid, dash and dash dot curves denote the fundamental, the 1st and the 2nd order SSPPs modes, respectively. The curves and symbols correspond to analytical and simulated results, respectively. Insets: The period unit of the waveguide with irregular pyramidal grooves.
