a novel photonic crystal ring resonator-based THz filter is proposed.In the resonator
a square dielectric rod is introduced and a scattering dielectric rod is introduced to each side of the rod.Silicon with refractive index n =3.4is used as the substrate material with the lattice constant Aof 30μm.This filter is simulated and analyzed by using the FDTDbased Rsoft software and the results show that when the dielectric rod radius Ris 5.157 5μm
the side length of the internal square dielectric rod Lis 92μm with a rotation angle of 6°and the scattering dielectric rod radius R1 is 5μm
the transmittance at the wavelength of 94.053μm is 0.985 56.