Metasurfaces, a two-dimensional (2D) form of metamaterials constituted by planar meta-
atoms, exhibit exotic abilities to tailor electromagnetic (EM) waves freely. Over the past …

In past decades, terahertz radiation, which locates between microwave and far‐infrared light
in the electromagnetic spectrum, has attracted more and more attention. Various passive …

Dynamic manipulation of electromagnetic (EM) waves with multiple degrees of freedom
plays an essential role in enhancing information processing. Currently, an enormous …

The reversible phase transition in vanadium dioxide (VO 2) with light, heat, electric,
magnetic, and mechanical stimuli is the enabling concept to function as a smart material. It is …

The strikingly contrasting optical properties of various phases of chalcogenide phase
change materials (PCM) has recently led to the development of novel photonic devices such …

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

Vortex beams (VBs), possessing a helical phase front and carrying orbital angular
momentum (OAM), have attracted considerable attention in optical communications for their …

Chiral media exhibit optical activity, which manifests itself as differential retardation and
attenuation of circularly polarized electromagnetic waves of opposite handedness. This …

Terahertz (THz) radiation has received much attention during the past few decades for its
potential applications in various fields, such as spectroscopy, imaging, and wireless …

Metasurfaces have shown their great capability to manipulate electromagnetic waves. As a
new concept, reconfigurable metasurfaces attract researchers' attention. There are many …