Feature issue introduction: Material platforms and experimental approaches for quantum nanophotonics

The emerging field of quantum nanophotonics offers potential chip-scale integration of multi-functional quantum processing infrastructures. The key technological challenges lie on new material design and integration with quantum emitters. It is of fundamental importance in developing hybrid material platforms and experimental approaches to address a wide array of challenging issues that cannot be easily overcome with conventional quantum optics approaches. This special issue features 10 contributions that address various aspects of emerging quantum photonic platforms, devices and approaches that combine the advantages of several material systems to realize chip-scale quantum information processing in an efficient and robust manner.