Planar optical elements that can manipulate the multidimensional physical parameters of
light efficiently and compactly are highly sought after in modern optics and nanophotonics. In …

Achromatic focusing is essential for broadband operation, which has recently been realised
from visible to infrared wavelengths using a metasurface. Similarly, multi-terahertz functional …

We propose a terahertz (THz) vortex emitter that utilizes a high-resistance silicon resonator
to generate vortex beams with various topological charges. Addressing the challenge of …

Electromagnetic waves carrying orbital angular momentum (OAM), namely, vortex beams,
have a plethora of applications ranging from rotating microparticles to high‐capacity data …

To accommodate the ever-increasing wireless capacity, the terahertz (THz) orbital angular
momentum (OAM) beam that combines THz radiation and OAM technologies has attracted …

Terahertz (THz) vortex waves carrying orbital angular momentum (OAM) hold great potential
in dealing with the capacity crunch in wireless high-speed communication systems …

Liquid crystals (LCs) have been adopted to induce tunable physical properties that
dynamically originated from their unique intrinsic properties responding to external stimuli …

Active terahertz elements with multifunction are highly expected in security screening,
nondestructive evaluation, and wireless communications. Here, we propose an innovative …