Directional sorting of exciton emissions from twisted WS₂/WSe₂ hetero-bilayers using self-coupled photonic crystal resonances.

ABSTRACT: Recent advances in two-dimensional semiconductor hetero-bilayers have revealed that the stacking angle between adjacent layers provides an additional degree of freedom to tune exciton states, enabling fascinating twist-angle-dependent photoluminescence. To control exciton emission properties, hetero-bilayers are usually integrated with photonic nanostructures, however, in which the contact interfaces can result in substantial luminescence suppression. To overcome this fundamental issue, we herein directly pattern photonic crystal (PhC) nanostructures in free-standing WS₂/WSe₂ hetero-bilayers to avoid the involvement of contact interfaces. Such PhC nanostructured WS₂/WSe₂ hetero-bilayers not only provide new exciton states but also offer guided mo

SUBMITTER: Chen Y 

PROVIDER: S-EPMC12024640 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature