Metal-dielectric-metal metasurface SERS substrate

The utility model relates to a metal-dielectric-metal super-surface SERS (Surface Enhanced Raman Scattering) substrate. The SERS substrate comprises a first SiO2 base layer, a noble metal layer arranged on the surface of the first SiO2 base layer, a second SiO2 base layer arranged on the surface of the noble metal layer, a groove arranged on the surface of one side of the second SiO2 base layer close to the noble metal layer, and a plurality of noble metal lines arranged on the bottom surface of the groove. By using the metal-dielectric-metal super-surface SERS substrate disclosed by the utility model, molecules to be detected do not need to be accurately adsorbed on a hot spot area on the surface of the substrate in SERS detection, so that the pollution of the molecules to be detected on the surface of the substrate is avoided, and continuous SERS detection is realized. 本实用新型涉及一种金属-电介质-金属超表面SERS基底。本实用新型SERS基底包括第一SiO2基层，在第一SiO2基层表面设置有贵金属层，在贵金属层表面设置有第二SiO2基层，在第二SiO2基层靠近贵金属层一侧的表面上设有凹槽，在凹槽的底面设置有若干贵金属线。本实用新型金属-电介