Spinning single-photons with metasurfaces

Can nanodiamond (ND) incorporated metasurfaces be used to spin single-photons so as to produce bright and polarization-pure sources of single-photons carrying the designed orbital angular momentum (OAM)? This project aims to demonstrate a novel and compact platform with NDs incorporated metasurfaces  to produce single-photon OAM sources, which will contribute to the quantum technological evolution, enabling secure communication based on single-photon quantum key distribution, optical quantum computing or light-matter interfaces for quantum information storage.