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

A reconfigurable intelligent surface (RIS) is a planar structure that is engineered to
dynamically control the electromagnetic waves. In wireless communications, RISs have …

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

Metasurfaces enable a new paradigm to control electromagnetic waves by manipulating
subwavelength artificial structures within just a fraction of wavelength. Despite the rapid …

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 …

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 …

Wide field-of-view (FOV) optical functionality is crucial for implementation of advanced
imaging and image projection devices. Conventionally, wide FOV operation is attained with …

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

Metalenses have shown great promise in their ability to function as ultracompact optical
systems for focusing and imaging. Remarkably, several designs have been recently …