Blazed metasurface grating: The planar equivalent of a sawtooth grating

Abstract

The blazing behavior of non-planar sawtooth gratings are mimicked with a planar metasurface. We show that with an appropriate design, an equivalent planar “blazed metasurface” can reflect most of the incident power back in the path of incidence, and with reduced power reflected in the specular direction. We then utilize such metasurface to create high rejection stopband in a waveguide, by lining the sidewall of the guide with this metasurface. The results are justified by theory, as well as simulations and measurements. The blazed metasurface may find various applications in microwaves up to optical frequencies, e.g. for stopband filters, Fabry-Perot resonator mirrors, or replacing corner reflectors.