An all-dielectric metasurface absorber based on surface wave conversion effect

The high-absorption ultra-thin metasurface absorber has important applications in EM radiation prevention and stealth design. In this paper, the proposed metasurface absorber composed of one-dimensional phase gradient supercell and uniform resonant supercell can reach perfect absorption at 10 GHz by reducing the scattering of the surface wave. Furthermore, the two-dimensional phase gradient metasurface absorber has better absorption of waves with different polarization angles and a wider range of incident angles. Our work provides a promising method to achieve high absorption, which is simpler and more robust than adjusting the effective EM parameters of metasurface absorber.