Introduction . Single photons are a key enabler in emerging quantum technologies including secure quantum communications1 , 2and quantum computing3 , 4 , 5. A central challenge in developing scalable photonic quantum hardware is to realize high-quality single-photon sources (SPSs) and interface them with advanced photonic integrated circuits (PICs). SPSs based on solid-state quantum emitters, such as quantum dots (QDs) or color defect centers, are suitable platforms to ...