Probing the optical coherence of quantum emitters in a WSe₂ monolayer

Quantum emitters in monolayer transition-metal dichalcogenides are a promising platform for quantum communication in a direct-bandgap, semiconducting light-matter interface. However, demonstrating the optical coherence of these emitters remains an outstanding challenge, thus limiting their application as sources of entangled photons. Here, we probe the quality of single-photon emitters in WSe₂ monolayers as a function of dielectric environment and excitation energy and determine the effects on spectral wander, purity, and brightness. We further report on our on-going efforts to directly measure the optical coherence of these emitters.