The Sensitivity Analysis of Metasurface-based Sensor

In this paper, we proposed a sensitive sensor for detecting an ultra-wide range of different kinds of materials that represented by the dielectric permittivity. Based on the boundary conditions of the electromagnetic field and the propagation properties of planar electromagnetic waves in a three-layer flat media, we analyze the sensitivity of the metasurface structure loaded at the media interface by mathematical derivations and HFSS simulations. In the metasurface-based sensor, the parallel resonance surface structure has the ability to tune $f_{0}$ . Compared with the sensing structure without metasurface design, the metasurface case can enhance the sensitivity in detecting the wide range of material with permittivity $10\sim 100$ . We compare the theoretical calculations with the full-wave simulations, and the results demonstrate that they match well with each other, validating the advantage of employing metasurface design to sensor for wide-range material sensing.