▎ 摘　　要

NOVELTY - The utility model claims a periodic grating structure of graphene surface plasmon polaritons propagating device, wherein it comprises an upper surface etching of silicon dioxide substrate layer and the graphene layer, the silicon dioxide base layer with a periodic grating structure, the periodic grating structure of the ridge is provided with organic dye gain medium, the graphene layer is array nano band structure of the graphene layer on the surface of the silicon dioxide base layer and array nanometre belt structure of graphene laminated. The device can enhance the SPP resonance, period graphene SPP waveguide propagation distance is improved, and it is simple in structure and easy to realize.