Fig. 1
Principle of metasurface OAM holography. a Schematic of an OAM-conserving meta-hologram capable of transferring the OAM property from an OAM incident beam to a holographic image. b Schematic illustration of the OAM property transfer in the spatial frequency domain (k-space). c The phase (φ) and intensity (I) distributions of single pixels in the reconstructed holographic images, respectively. Pseudo colors are used to visualize different OAM modes. d Schematic of an OAM-selective meta-hologram sensitive to a given OAM mode. e Schematic illustration of the OAM conversion from an incident OAM beam to a fundamental spatial mode after passing through an OAM-selective meta-hologram. f The phase (φ) and intensity (I) distributions of single pixels in the reconstructed holographic images using different OAM modes. High intensity is achieved in each pixel whenever the incident light has a topological charge matching the design of the interface. g Schematic of an OAM-multiplexing meta-hologram capable of reconstructing multiple distinctive OAM-dependent holographic images
