Tunability\nof the Energy Transfer Process in Type-II\nHeterostructures

The modulation of energy transfer processes in transition\nmetal\ndichalcogenide heterostructures signifies a promising avenue for the\nprecise control of energy distribution and flow at the nanoscale.\nTypically, in type-II heterostructures, energy transfer is overshadowed\nby ultrafast charge processes. However, in this study, the manipulation\nof an energy transfer process in the MoS<sub>2</sub>/WS<sub>2</sub> heterostructure has been accomplished through the introduction of\na resonant state. By employing optical techniques with energy, temporal,\nand spatial resolutions, we discern both charge and additional energy\ntransfer processes. The energy transfer is ascribed to the resonant\nenergy alignment between the WS<sub>2</sub> A exciton and the newfound\nresonant state of MoS<sub>2</sub>. Through the modulation of the energy\nof the resonant state, this study introduces a novel approach to fine-tune\nthe energy transfer process. This endeavor not only sheds light on\nthe fundamental mechanisms of charge and energy transfer at interfaces\nbut also provides a straightforward yet robust method to regulate\nenergy flow in type-II heterostructures. The findings bear significant\nimplications for advancing the comprehension of these processes and\noffer practical insights for the development of electronic devices\nwith tailored functionalities.