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. 2021 Nov 2;10:222. doi: 10.1038/s41377-021-00667-7

Fig. 4. Schematic of CVB modes multiplexing/demultiplexing by using metasurface-based Dammann optical vector gratings.

Fig. 4

a1 Polarization and intensity distributions in each diffraction order with Gaussian beam incident, respectively. a2 Polarization and intensity distributions in each diffraction order with CVB (m = −1) incident. b1 Measured coaxial CVB with 4 modes (m=±1,±2); b2b5 measured Gaussian points after demultiplexing of the different CVB mode channels