Electrically tunable ultrafast dynamics and interactions of hybrid excitons in a 2D semiconductor bilayer.

ABSTRACT: Extended efforts have been devoted to the study of strongly-interacting excitons and their dynamics, towards macroscopic quantum states of matter such as Bose-Einstein condensates of excitons and polaritons. Momentum-direct layer-hybridized excitons in transition metal dichalcogenides have attracted considerable attention due to their high oscillator strength and dipolar nature. However, the tunability of their interactions and dynamics remains unexplored. Here, we achieve an unprecedented control over the nonlinear properties of dipolar layer-hybridized excitons in an electrically gated van der Waals homobilayer monitored by transient optical spectroscopy. By applying a vertical electric field, we reveal strong Coulomb interactions of dipolar hybrid excitons, leading to opposite density-d

SUBMITTER: Lopriore E 

PROVIDER: S-EPMC12663099 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature