Generation of Millimeter-Wave Circular Airy Vortex Beam with Huygens' Metalens

This paper presents a design for generating non-diffracting millimeter-wave circular Airy vortex beam using ultra-thin Huygens” metalens. The study provides a comprehensive analysis of Airy vortex beam generation through theoretical examination and full-wave numerical simulations. It has been demonstrated that by incorporating an azimuthal spiral phase component into a circular Airy beam., a circular Airy vortex beam can be produced. Then., based on the calculated phase distribution., the Huygens” metal ens design is realized. Simulated results demonstrate the behavior of Airy vortex beam contrasts with conventional vortex beams. The circular Airy vortex beam displays non-diffracting properties., enabling it to maintain its narrow-divergence structure over significant distances. These unique propagation dynamics create new opportunities for high data-rate communication systems.