Metasurfaces for quantum photonics

Rapid progress in the development of metasurfaces allowed to replace bulky optical assemblies with thin nanostructured films, often called metasurfaces, opening a broad range novel and superior applications generation, manipulation, detection light classical optics. Recently, these developments started making headway quantum photonics, where opportunities arose for control nonclassical nature light, including photon statistics, state superposition, entanglement, single-photon detection. In this Perspective, we review recent field quantum-photonics focusing on innovative promising approaches create, manipulate, detect light.