Generation and multiplexing of double-polarized terahertz vortex combs
Chinese Academy of SciencesElectromagnetic waves with vortex-shape, namely vortex beams, are important in various fields. However, multi-mode OAM beams are rarely seen. To solve this, the researchers in China propose a metasurface design scheme that generates double-polarized vortex combs in the terahertz band, with flexible control of the mode numbers, positions, and intervals.