All-dielectric metasurface sensor excited by Anapole

The embodiment of the invention provides an all-dielectric metasurface sensor excited by Anapole. The all-dielectric metasurface sensor comprises a substrate; the plurality of metasurface bodies are arranged on the substrate in an array mode, every two adjacent metasurface bodies are arranged at intervals, each metasurface body is symmetrically arranged relative to an X axis and symmetrically arranged relative to a Y axis, the Y-axis length of each metasurface body is larger than the X-axis length, and the X-axis length of each metasurface body is larger than the Y-axis length of each metasurface body. Each super-surface body is provided with a pair of defects which are symmetrically arranged about the Y axis, the pair of defects are arranged at intervals, each defect is symmetrically arranged about the X axis and symmetrically arranged about the Y axis, and the Y-axis length of the defect is smaller than the X-axis length of the defect. When a terahertz electric field is in normal incidence along the X direc