▎ 摘　　要

NOVELTY - The converter has a three-layer super-surface structure arranged with an upper metal grating layer (1), a metal antenna layer (2) and a lower metal grating layer (3). The upper metal grating layer and the lower metal grating layer are separated by a dielectric layer 5). A graphene layer is attached to a surface of the metal antenna layer. A converter main body performs differential modulation to amplitude and phase of two orthogonal polarization components of terahertz wave to realize cross polarization conversion. USE - Transmission-type terahertz polarization converter based on graphene for use in photoelectric functional device for use high-speed communication technology. ADVANTAGE - The converter combines the graphene with the metal ultra-surface, using the conductivity of the graphene under the action of the grid bias voltage adjustable electromagnetic characteristics, and modulates the polarization conversion characteristics of the metal super-surface so as to realize the broadband transmission terahertz cross polarization conversion with adjustable efficiency. The converter has strong stability, high working bandwidth, and high stability. The dielectric layer uses Fabry-Perot interference effect to improve the cross-polarization conversion efficiency and working bandwidth of the converter. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the transmission-type terahertz polarization converter based on graphene for use in photoelectric functional device for use high-speed communication technology. 1Upper metal grating layer 2Metal antenna layer 3Lower metal grating layer 4Graphene layer 5Dielectric layer