▎ 摘　　要

NOVELTY - The utility model claims a plasmon modulator, wherein the graphene surface of a periodic structure, comprising a main waveguide structure and the electrode, the main waveguide structure is orderly overlapped graphene-niobate-graphene structure, the lithium niobate dielectric layer surface is branch waveguide structure period, each graphene layer with an electrode, the electrodes are symmetrically two graphene layers is provided. This surface plasmon modulator extinction ratio is high, the size is small, which can use the phase, intensity, and frequency of light modulation, can realize fast identification, by photoelectric detector system is simplified, the cost is low, and easy to realize.