▎ 摘　　要

NOVELTY - The modulator has a substrate (10) provided with a graphene-based long range SPP waveguide structure to be connected with first and second electrode (301, 302), an optical input terminal and an optical output terminal. The waveguide structure comprises a first high refractive index material layer (201), a first graphene layer (202), a first low refractive index material layer (203), a metal film layer (204), a second low refractive index material layer (205), a second graphene layer (206) and a second high refractive index material layer (207) that are sequentially formed on the substrate. USE - Graphene-based electro-absorption optical modulator. ADVANTAGE - The modulator utilizes long-range SPP waveguide and dielectric loaded SPP waveguide to facilitate large modulation depth, small insertion loss, high quality factor and strong limiting effect on a light field, thus providing an improved and simple modulator for large-scale production in an efficient manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for manufacturing a graphene-based electro-absorption optical modulator. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic circuit diagram of a graphene-based electro-absorption optical modulator. Substrate (10) High refractive index material layer (201, 207) Graphene layer (202, 206) Low refractive index material layer (203, 205) Metal film layer (204) Electrodes (301, 302)