Spatial Splitting and Coupling of the Edge Modes in the Graphene Bend Waveguide

摘要: The spatial splitting and coupling between the edge modes in graphene bend-ribbon waveguide are presented this paper. We reveal a new phenomenon that spatially split with strongly confined even (odd) symmetric modal field shifts to exterior (interior) of waveguide, which is stark contrast conventional bend waveguide. Periodical couplings two due have been described using coupled mode theory. theoretical results power critical angles under different angles, widths, or chemical potentials consistent numerical simulations. Numerical calculations show could achieve superior wave guiding nearly no bending loss shift at smaller width, larger radius, higher potential. This work may provide perspective understand