▎ 摘　　要

NOVELTY - The modulator has a first metal electrode (301) formed on the first graphene electrode (201). A second metal electrode (302) is formed on the second graphene electrode (202). A high electro-optic coefficient material optical waveguide (203) is formed on the substrate layer. A low refractive index covering layer (102) covers the high electro-optic coefficient material optical waveguide. The first graphene electrode and the second graphene electrode are respectively attached on both sides of the high electro-optic coefficient material optical waveguide. USE - Electro-optic modulator. ADVANTAGE - The electro-optic modulator is miniaturized and improves the efficiency of electro-optic modulation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of electro-optic modulator. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the electro-optic modulator. Low refractive index covering layer (102) First graphene electrode (201) Second graphene electrode (202) High electro-optic coefficient material optical waveguide (203) Metal electrode (301,302)