Ultrafast laser spectroscopy of exciton dynamics in CVD-grown monolayer MoS$_2$

Recently, much effort has been devoted to the spin-valley interplay in exfoliated monolayer MoS$_2$, yet the many-body interactions in this material are largely unexplored. In fact, monolayer MoS$_2$ offers a special platform in the study of many-body effects owing to its 2D nature with a large band gap and a giant exciton binding energy. Here, we use ultrafast laser spectroscopy to study the exciton dynamics of CVD-grown monolayer MoS$_2$. We observed a strongly non-linear fluence dependent behavior which indicates presence of many-body interactions in this material.