▎ 摘　　要

NOVELTY - The utility model claims a terahertz ultra-surface modulator based on terahertz waveband, comprising a silicon dioxide medium layer (3) at the bottom, wherein the silicon dioxide medium layer (3) is provided with uniformly spaced graphene strip (2); the upper part of the graphene strip (2) is provided with a metal cross structure (4); four areas divided by the metal cross structure (4) respectively provided with opening metal opening resonant ring (1); the metal cross structure (4) can be directly excited by the incident electromagnetic wave; the openings of the four metal opening resonant rings (1) are in different directions. The utility model can be well applied to terahertz waveguide and gyrotron, ensuring the reuse of the reflected wave on the basis of ensuring the high transmission of the terahertz incident wave.