Optical metasurfaces for generating and manipulating optical vortex beams

Abstract Optical vortices (OVs) carrying orbital angular momentum (OAM) have attracted considerable interest in the field of optics and photonics owing to their peculiar optical features extra degree freedom for information. Although there been significant efforts realize OVs using conventional optics, it is limited by large volume, high cost, lack design flexibility. metasurfaces recently tremendous due unprecedented capability manipulation amplitude, phase, polarization, frequency light at a subwavelength scale. revolutionized concepts photonics, providing new platform develop ultrathin devices realization resolution. In this article, we will review recent progress metasurface-based OVs. We provide comprehensive discussion on OVs, including OAM superposition, sorting, multiplexing, holography, nonlinear generation manipulation. The rapid development metasurface play an important role many relevant research fields. expect that fuel continuous wearable portable consumer electronics where low-cost miniaturized related systems are demand.