Triple-exposure holographic multiplexing for tunable vector-vortex beam generation using different reconstruction effects in azo-carbazole polymer films

We present a novel, to the best of our knowledge, method for generating vector-vortex beams through linear polarization multiplexing of intensity and polarization holograms. Utilizing the rewritable properties of an azo-carbazole polymer film, we experimentally demonstrate the simultaneous generation of two distinct vector-vortex beams from the first-order diffraction of the single hologram using a triple-exposure recording technique. This approach enables the selective generation of vector-vortex beams by utilizing different reconstruction effects like FRE, ORE, or NRE and by simply adjusting the polarization state of the reading beam. This method significantly simplifies the generation of multiple vector-vortex beams and offers promising potential for applications in optical communication and encryption.