Generation of non-diffracting vortex beams by an Archimedean spiral plate

Abstract

The non-diffraction beams are featured with maintained phase and intensity profiles, which have been utilized in various fields. Previous approaches for producing non-diffraction beams focused on designed cubic optical elements, resulting in limitations for integrated applications. Here, we design a mask with a binary Archimedean spiral structure for generating a high-order non-diffraction vortex beam. The produced plate imparts a conical phase to the incident beam, enabling the modulated beam to possess the characteristics of a Bessel wave, i.e., the spiral phase, non-diffraction, and self-healing. This mask may find promising applications, e.g., optical communication and imaging.