BACKGROUND Metasurfaces have opened up a number of remarkable new approaches to
manipulate light. These flat optical elements are constructed from a dense array of strongly …

Intelligent metasurfaces have gained significant importance in recent years due to their
ability to dynamically manipulate electromagnetic (EM) waves. Their multifunctional …

Digitally programmable metasurfaces are of potential use in wireless multiplexing
techniques because they can encode and transmit information without using traditional radio …

Antenna array technology enables the directional transmission and reception of wireless
signals for communication, localization, and sensing purposes. The signal processing …

Metasurfaces have promising potential to revolutionize a variety of photonic and electronic
device technologies. However, metasurfaces that can simultaneously and independently …

Here we present a roadmap on Photonic metasurfaces. This document consists of a number
of perspective articles on different applications, challenge areas or technologies underlying …

The overall article presents the authors' vision of the emerging field of spacetime
metamaterials, and related systems, in a cohesive and pedagogical perspective …

Applications such as microwave wireless communications, optical light fidelity, and light
detection and ranging systems require advanced interfaces that can couple guided waves …

So far, the environment has been considered as a source of fading, clutter, and blockage,
with detrimental consequences for efficiency and robustness of communication systems …

For optics, like semiconductor heterostructures, the interfaces and inhomogeneities in
materials can manipulate optical waves and fields. Numerous photonic devices and …