Emitter dephasing significantly affects the performance of solid-state single-photon sources, with acoustic phonons being an important cause of decoherence. Researchers have demonstrated a method to tune and enhance the coherence of photons emitted from a single WSe2 monolayer quantum dot by selectively coupling it to a spectral cavity resonance. Using an open cavity, they achieved spectral enhancement, leveling, and suppression of the phonon sideband, aligning well with microscopic models of exciton-phonon dephasing in two-dimensional systems. Optical interferometry confirmed that cavity tuning can effectively manage dephasing and improve the coherence of quantum emitters in atomically thin crystals. [Full article]
