STUDY OF PRINCIPLE OF METASURFACE BASED ON THE GENERALIZED SNELL'S LAW

As two-dimensional performance of metamaterials, the metasurface is made up of atomic structures on the subwavelength scale, and the phase, propagation direction and physical mechanism of the incident electromagnetic wave can be modulated by using a single or multilayer structure. In this paper, the generalized Snell's law is used to describe the influence of phase variation introduced at the interface on the refraction characteristics of electromagnetic waves, and the propagation mechanism of metasurface phase is studied by combining the plasma fundamental mode waveguide theory and the Poincaré sphere model. Meanwhile, taking gold-silicon dioxide-gold waveguide and planar meta-lenses as examples, the applications of transmission phase and geometric phase are introduced respectively, and some solutions are proposed for the difficulties encountered in the applications of transmission phase and geometric phase.