▎ 摘　　要

We describe the coupling dynamics of one-dimensional surface plasmon polaritons supported by a pair of heterojunctions between two-dimensional media. We first discuss the unique symmetry properties of the supermodes of such structures, and then we exploit the possibility of electrically tuning the conductivity of graphene to demonstrate tailoring and manipulation of light propagation in a graphene/graphene platform. (C) 2016 Optical Society of America