Solid-state single-photon sources are fundamental building blocks in quantum optical technologies. In this regard, atomically thin crystals have emerged as a potential candidate as sources of quantum light. This work implements a bright single-photon source based on a monolayer of WSe2 coupled to a tunable, open optical cavity in a liquid-helium-free cryostat. Its performance is characterized by high single photon purity (>95%) and record-high, first-lens brightness of linearly polarized photons of 65 ± 4%,representing a milestone towards quantum applications. [Full article]
