During the past few years, metasurfaces have been used to demonstrate optical elements
and systems with capabilities that surpass those of conventional diffractive optics. Here, we …

Plasmonic metasurfaces, which can be considered as the two-dimensional analog of metal-
based metamaterials, have attracted progressively increasing attention in recent years …

We present a set of universal relations which relate the local transmission, reflection, and
polarization conversion coefficients of a general class of non-magnetic passive ultrathin …