the THz region. This new circulator is formed by three 120 symmetrical metal-based
waveguides with a multi-layer triangular graphene-based post. The anisotropic feature for
circulation is provided by magnetically-biased graphene in the triangular post. The DC
magnetic bias is applied in the z-direction. The magnetized, triangular graphene sheet
supports hybrid TM-TE plasmons. To realize the proposed circulator, the structure has been …