▎ 摘　　要

NOVELTY - The utility model claims a doped graphene of suspended based on the doped graphene SPR THz-gas sensor system, the system comprises a broadband terahertz beam transmitter, terahertz beam detector, a germanium prism, the gas sample and a suspended single-layer graphene doped device, located between the gas sample and air; germanium prism located in the gas sample to be detected above, germanium prism beam emitter broadband terahertz and terahertz beam detector between. doped graphene material in this utility model with high performance to replace the metal material and uses the broadband terahertz attenuated total reflection technology to replace the angle modulation technology to design out of suspended graphene sensor with similar sandwich structure. Besides changing the resonance system surface plasma, so as to change the measuring range and the sensing performance of the system, the design of the gas sensor with flexibility through doping levels of incident angle changing terahertz light source and graphene.