Metasurfaces for quantum photonics

Progress in the field of quantum-photonics applications of metasurfaces is reviewed. Cutting-edge research, including the development of optical chips supporting high-dimensional quantum entanglement and advanced quantum tomography, is summarized. Rapid progress in the development of metamaterials and metaphotonics allowed bulky optical assemblies to be replaced with thin nanostructured films, often called metasurfaces, opening a broad range of novel and superior applications of flat optics to the generation, manipulation and detection of classical light. Recently, these developments started making headway in quantum photonics, where novel opportunities arose for the control of non-classical nature of light, including photon statistics, quantum state superposition, quantum entanglement and single-photon detection. In this Perspective, we review recent progress in the emerging field of quantum-photonics applications of metasurfaces, focusing on innovative and promising approaches to create, manipulate and detect non-classical light.

Automated summary

Progress in the field of quantum-photonics applications of metasurfaces is rapidly advancing, enabling the development of optical chips and advanced quantum tomography. With the use of metamaterials and metaphotonics, bulky optical assemblies are being replaced with thin nanostructured films, leading to innovative approaches in controlling non-classical light properties.