Coherent exciton-exciton interactions and exciton dynamics in a MoSe2/WSe2 heterostructure
Abstract
Coherent coupling between excitons is at the heart of many-body interactions with transition metal dichalcogenide (TMD) heterostructures as an emergent platform for the investigation of these interactions. We employ multi-dimensional coherent spectroscopy on monolayer MoSe2/WSe2 heterostructures and observe coherent coupling between excitons spatially localized in monolayer MoSe2 and WSe2. Through many-body spectroscopy, we further observe the absorption state arising from free interlayer electron-hole pairs. This observation yields a spectroscopic measurement of the interlayer exciton binding energy of about 250 meV.
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