Controlled coherent-coupling and dynamics of exciton complexes in a MoSe2 monolayer

The experimental/theoretical data presented is related to the article "Controlled coherent-coupling and dynamics of exciton complexes in a MoSe2 monolayer"

Quantifying and controlling the coherent dynamics and couplings of optically active excitations in solids is of paramount importance in fundamental reasearch in condensed matter optics and for their prospective optoelectronic applications in quantum technologies. Here, we perform ultrafast coherent nonlinear spectroscopy of a chargetunable MoSe2 monolayer. The experiments show that the homogeneous and inhomogenenous line width and the population decay of exciton complexes hosted by this material can be directly tuned by an applied gate bias, which governs the Fermi level and therefore the free carrier density. By performing two-dimensional spectroscopy, we also show that the same bias-tuning approach permits us to control the coherent coupling strength between charged and neutral exciton complexes.