Phonon Sidebands in Monolayer Transition Metal Dichalcogenides
Phonon Sidebands in Monolayer Transition Metal Dichalcogenides
Excitons dominate the optical properties of monolayer transition metal dichalcogenides (TMDs). Besides optically accessible bright exciton states, TMDs exhibit also a multitude of optically forbidden dark excitons. Here, we show that efficient exciton-phonon scattering couples bright and dark states and gives rise to an asymmetric excitonic line shape. The observed …