Metasurfaces, which offer a diverse range of functionalities in a remarkably compact size,
have captured the interest of both scientific and industrial sectors. However, their inherent …

Rare‐earth (RE) ion doped crystalline materials have a wide spectrum of applications in
lasers, amplifiers, sensors, as well as classical and quantum information processing. The …

Electro-optic modulators are essential for sensing, metrology and telecommunications. Most
target fiber applications. Instead, metasurface-based architectures that modulate free-space …

The rapid development of optical metasurfaces, 2D ensembles of engineered
nanostructures, is presently underpinning a steady drive toward the miniaturization of many …

Metasurfaces have seen a great evolution over the last few years, demonstrating a high
degree of control over the amplitude, phase, polarization, and spectral properties of reflected …

Nonlinear optics is a well-established field of research that traditionally relies on the
interaction of light with macroscopic nonlinear media over distances significantly greater …

In this Perspective, we discuss the different opportunities offered by time-modulated
metasurfaces for dynamic wavefront engineering and space-time photonics. Efforts in …

In recent years, active metasurfaces have emerged as a reconfigurable nanophotonic
platform for the manipulation of light. Here, application of an external stimulus to resonant …

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 …

Tailored nanostructures provide at-will control over the properties of light, with applications
in imaging and spectroscopy. Active photonics can further open new avenues in remote …