Fig. 6: Triangular waveguide resonator based on CABSs.
From: Observation of boundary induced chiral anomaly bulk states and their transport properties
a Photonic crystal waveguide (microwave frequencies) bounded by perfect electrical conductor boundaries above and below and periodic boundaries on the left and right. Right panel: band dispersion of the photonic crystal waveguide and the corresponding electric field (colors) and the phase (colors) field of a CABS in the pseudogap (shadowed region). b Simulated electric field distributions at 11.9 GHz excited by a point source (red star) on the right of the 120-degree-bend waveguide. Right panels: the corresponding Fourier spectra of the electric fields in the magenta dashed rectangle. c Triangular waveguide resonator (the layer number is 8 and the permittivity of the dielectric is \(\varepsilon=12+0.002*{{{{{\rm{i}}}}}}\)) coupled with an eight-layer waveguide which is excited by a point source on the right at 482 THz (light wave frequencies). Note the uniformity of the resonance mode. d The resonator is changed to a solid triangle with the same bulk system parameters. Note that the resonance disappeared.
