Hybridization of intralayer excitons in transition-metal dichalcogenide heterostructures with excited interlayer excitons

The hybridization of inter- and intralayer excitons has been demonstrated in various transition metal dichalcogenide (TMDC) heterostructures using an out-of-plane electric field to tune the interlayer exciton energy into resonance with the intralayer state. We have examined this phenomenon experimentally in MoTe₂/MoSe₂ heterobilayers. Our results indicate that excited interlayer exciton states (such as the 2p state) must be considered to explain our spectroscopic observations in reflection contrast and photoluminescence measurements acquired as a function of the applied perpendicular electric field. We will present our experimental findings and compare with ab-initio theory that explains the importance of the excited interlayer exciton transitions in terms of the angular momentum content of the different states that hybridize with one another.