▎ 摘　　要

NOVELTY - The coupler has a coupling wave-guide unit comprises a first strip waveguide unit, a plasma waveguide unit, a second strip waveguide unit. The second strip waveguide unit is connected with a strip-shaped output waveguide unit. The plasma waveguide unit is comprises a bottom layer waveguide unit, a lower layer graphene unit, a medium layer graphene unit and a metal covering layer. The lower layer graphene unit and the metal covering layer are connected with an external electrode. USE - Graphene surface plasma excimer 2-um-oriented band based tunable power coupler. ADVANTAGE - The coupler is simple in structure, and has less volume, high working efficiency, and ensures better external voltage regulating effect and signal intensity adjusting effect. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a graphene surface plasma excimer 2-um-oriented band based tunable power coupler.