Fig. 1

Schematics of multidimensional manipulation of hBN quantum emission using a multifunctional metalens. A Directional photon splitting, polarisation control and subsequent OAM encoding. The green arrows stand for the directionality control of SPE emission collected by the metalens. The two sine waves indicate the splitting of SPE emission into two orthogonally polarised streams. The two helical beams indicate a further dressing by OAM. B, C Enlarged views of each encoding concept where grating and vortex grating are adapted to structure the photons in extra dimensions. In addition, the directionality of orthogonal linear polarisations is well inherited and projected as the red and blue spots in the momentum (k) space