Electrically tunable ultrafast dynamics and interactions of hybrid excitons in semiconducting bilayers

Optically active two-dimensional materials host a variety of excitonic species with a high degree of controllability. In particular, the dipolar nature of layer-hybridized excitons in van der Waals bilayers can be modulated by an applied vertical electric field. However, the tunable interactions and dynamics of hybrid species remains largely unexplored until now. In this work, we unveil the modulation of dipolar interactions and ultrafast temporal dynamics of hybrid excitons in field-effect devices based on bilayer transition metal dichalcogenides. Our work opens up new venues for the time-domain study of electrically tunable dipolar excitons in van der Waals heterostructures.