Polarization switching and electrical control of interlayer excitons in two-dimensional van der Waals heterostructures.

ABSTRACT: Long-lived interlayer excitons in van der Waals heterostructures based on transition metal dichalcogenides, together with unique spin-valley physics, make them promising for next-generation photonic and valleytronic devices. While the emission characteristics of interlayer excitons have been studied, efficient manipulation of their valley-state, a necessary requirement for information encoding, is still lacking. Here, we demonstrate comprehensive electrical control of interlayer excitons in a MoSe₂/WSe₂ heterostructure. Encapsulation of our well-aligned stack with hexagonal boron nitride (h-BN) allows us to resolve two separate narrow interlayer transitions with opposite helicities under circularly polarized excitation, either preserving or reversing the polarization

SUBMITTER: Ciarrocchi A 

PROVIDER: S-EPMC6420072 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature