In electromagnetics and photonics,'nonlocality'refers to the phenomenon by which the
response/output of a material or system at a certain point in space depends on the input field …

Metasurfaces are planar metamaterials exhibiting certain inhomogeneous phase
distributions for transmitted or reflected waves, which can efficiently reshape the wave‐fronts …

Reconfigurable intelligent surfaces (RISs) are an emerging transmission technology for
application to wireless communications. RISs can be realized in different ways, which …

Metasurfaces are ushering in an era of multifunctional control over optical wavefronts
realized with ultrathin planarized devices. Recent advances have been enabling …

The concept of reconfiguring wireless propagation environments using intelligent reflecting
surfaces (IRS) s has recently emerged, where an IRS comprises of a large number of …

This work focuses on the downlink of a single-cell multi-user system in which a base station
(BS) equipped with M antennas communicates with K single-antenna users through a …

Metasurfaces are ultrathin metamaterials consisting of planar electromagnetic (EM)
microstructures (eg, meta-atoms) with pre-determined EM responses arranged in specific …

Graded metasurfaces exploit the local momentum imparted by an impedance gradient to
mold the impinging wave front. This approach suffers from fundamental limits on the overall …

The use of the generalized Snell's law opens wide possibilities for the manipulation of
transmitted and reflected wavefronts. However, known structures designed to shape …

Nonuniform metasurfaces (electrically thin composite layers) can be used for shaping
refracted and reflected electromagnetic waves. However, known design approaches based …