Herein, we have discussed three major methods which have been generally employed for
the generation of optical beams with orbital angular momentum (OAM). These methods …

Reflection inherently occurs on the interfaces between different media. In order to perfectly
manipulate waves on the interfaces, integration of antireflection function in metasurfaces is …

Transmissive and reflective metasurfaces have been extensively studied for generating an
orbital angular momentum (OAM)-carrying beam. However, the existing OAM generators …

Structured light beams such as optical vortices can carry the orbital angular momentum
(OAM) with an unbounded quantum number. Recent years have witnessed a growing …

The simultaneous and independent measurement of multiple movement forms is a
significant issue to be solved in research. In this paper, we proposed a method that …

Reconfigurable metasurface, also known as Reconfigurable Intelligent Surfaces (RIS), with
its flexible beamforming, low-cost, and easy industrial deployment characteristics, presents …

We reveal the mechanism of the noncoaxial rotational Doppler effect (RDE) of an optical
vortex and report its application in discriminating the orientation of the rotating axis of the …

Recently, spatiotemporally modulated metamaterial has been theoretically demonstrated for
the design of Doppler cloak, a technique used to cloak the motion of moving objects from the …

Rotational Doppler effect (RDE) has attracted much attention in recent years which opens
new avenues to angular velocity measurement. However, most previous studies used single …

Recent advancements have shown tensions between observations and our current
understanding of the Universe. Such observations may include the H 0 tension and massive …