In this paper, we review the generation of vortex beams carrying orbital angular momentum
in the microwave domain. We firstly present the theory of Laguerre–Gaussian beams where …

We present a time-coding reconfigurable intelligent surface (RIS) enabled spread-spectrum
secure wireless communication system. The time-coding spread-spectrum RIS is realized by …

Coding metasurfaces, characterized by processing the electromagnetic waves for specified
functions through predesigned coding sequences either in space or time, can manipulate …

This paper presents a new design of linear-polarization metasurface converter with arbitrary
polarization rotating angle. The linear-polarization conversion is achieved by first separating …

A broadband double‐layer transmissive metasurface (TMS) for effective generate vortex
electromagnetic wave is presented in this paper. The proposed TMS consists of two types of …

Electromagnetic waves carrying orbital angular momentum (OAM) have motivated a wealth
of applications. Achromatic or broadband OAM beams are preferred in many applications …

With the development of wireless communication, the demand for wider bandwidth and
higher data rates has significantly increased. The vortex beam carrying orbital angular …

A high-efficiency transmitted polarization converter based on a frequency selective surface
(FSS) is proposed in this paper. The FSS-based polarization converter (FSS-PC) is …

Optical vortex (OV) beams are ideal carriers for high-capacity optical communication, and
long-wave infrared (LWIR) is the ideal wavelength band for long-range optical …

In this paper, by elaborately splicing multiple transmissive metasurfaces (MSs) featuring
polarization isolation, multiple linear polarized (LP) vortex beams are generated …