Figure 4
From: Design and analysis of 2D one-way splitter waveguide based on topological photonics
By elimination of one row and two columns at the interface of the domains, a T-shaped waveguide splitter can be formed which can guide almost all of the frequencies in the bandgap with a very well efficiency. (a) A huge drop at f = 8.23 GHz is seen in the transmission spectrum at (b) exactly at the same frequency the electric field intensity increases dramatically at the junction. (c) The electric field profile at f = 7.82 GHz shows that light in the waveguide is split to the top and bottom ports and (d) at f = 8.23 GHz the light is localized and resonated.
