Quasi-Line Waves in Self-Inductive Impedance Surfaces

Line waves are distinct modes that arise along a line that connects two-dimensional impedance surfaces with a dual electromagnetic response. In general, line waves can be implemented using complementary impedances or impedances with a gain-loss effect. Whereas non-complementary dual surfaces support a quasi-line mode. we propose a structure in which non-dual structures with purely inductive impedances are used to drive the quasi-line mode. We investigate the implementation of quasi-line modes using multilayer graphenes. This mode has a wide bandwidth in the terahertz range and a significant propagation length. The proposed structure guides one-way modes in which the fields are highly concentrated around the edges of two inductive impedance structures. Furthermore, incorporating graphene into the proposed waveguide makes it possible to control its bandwidth and transmission characteristics.