Unidirectional Curved Surface Plasmon Polariton in a Radially Magnetized System

Dynamic manipulation of the surface plasmon polariton (SPP) and wave steering is important in plasmonic applications. In this work, we excite a curved SPP in topological continua by applying a radial magnetic bias. We believe that it is a new technique to create a unidirectional SPP traveling along a curved trajectory. We also derive a Green's function (GF) model for radially biased plasma, applicable to curved SPPs. We compare the properties of unidirectional curved SPPs with the usual case when an axial bias is applied.