Prolonging exciton lifetime of WSe₂ monolayer through image dipole interaction leading to huge enhancement of photocurrent.

ABSTRACT: Two-dimensional transition metal dichalcogenides (2D TMDs) have been demonstrated as one of the most outstanding materials not only for fundamental science but also for a wide range of photonic applications. However, an efficient way to control their excitonic properties is still needed for advanced applications with superior device performance. Here, we show that the exciton lifetime of WSe₂ monolayer can be prolonged using metamaterials. We observe a ∼100% reduction in the electron-hole recombination rate of WSe₂ monolayer placed on a hyperbolic metamaterial substrate and demonstrate that such a remarkable change results from the destructive image dipole interaction with the in-plane exciton transition dipole. Furthermore, this substantial increase in exciton lifeti

SUBMITTER: Lee KJ 

PROVIDER: S-EPMC11636519 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature