▎ 摘　　要

NOVELTY - The device has a silicon (Si) substrate formed with an oxidation medium layer. A surface of a plasma graphene waveguide is matched with the oxidation medium layer. The graphene waveguide is fixed with a SPPs excitation structure. An end side of the graphene waveguide is formed with a silicon dioxide (SiO2) layer and a gain medium. The graphene waveguide is a strip-shaped graphene waveguide. The gain medium is a dye gain medium of period array structure, where the dye gain medium is a mixture of rhodamine dye and five-methine indole cyanine dye. USE - Period diffraction fold excitation compensation graphene surface plasma waveguide transmitting device. ADVANTAGE - The device is inexpensive and easy to implement, has better transmitting effect for long distance, and avoids signal loss. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a period diffraction fold excitation compensation graphene surface plasma waveguide transmitting device.