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 …

Metasurfaces as optically thin composite layers can be modeled as electric and magnetic
surface current sheets flowing in the layer volume in the metasurface plane. In the most …

Optical analog signal processing has been gaining significant attention as a way to
overcome the speed and energy limitations of digital techniques. Metasurfaces offer a …

The angular response of thin diffractive optical elements is highly correlated. For example,
the angles of incidence and diffraction of a grating are locked through the grating momentum …

This tutorial provides an intuitive and concrete description of the phenomena of
electromagnetic nonreciprocity that will be useful for readers with engineering or physics …

Electromagnetic metasurfaces can be characterized as intelligent if they are able to perform
multiple tunable functions, with the desired response being controlled by a computer …

The fruitful progress toward light manipulation in reflective (R) or transmissive (T) geometry
(half‐space) has facilitated strong aspiration towards full‐space wave control. Although R–T …

Electromagnetic wave multiplexing, especially for that occurring at different incidences
(spatial-frequency multiplexing), is pivotal for ultrathin multifunctional interfaces and high …

Metasurfaces are thin two-dimensional metamaterial layers that allow or inhibit the
propagation of electromagnetic waves in desired directions. For example, metasurfaces …

Computing metasurfaces are two-dimensional artificial nanostructures capable of
performing mathematical operations on the input electromagnetic field, including its …