Radiative suppression of exciton-exciton annihilation in a two-dimensional semiconductor.

ABSTRACT: Two-dimensional (2D) semiconductors possess strongly bound excitons, opening novel opportunities for engineering light-matter interaction at the nanoscale. However, their in-plane confinement leads to large non-radiative exciton-exciton annihilation (EEA) processes, setting a fundamental limit for their photonic applications. In this work, we demonstrate suppression of EEA via enhancement of light-matter interaction in hybrid 2D semiconductor-dielectric nanophotonic platforms, by coupling excitons in WS₂ monolayers with optical Mie resonances in dielectric nanoantennas. The hybrid system reaches an intermediate light-matter coupling regime, with photoluminescence enhancement factors up to 10². Probing the exciton ultrafast dynamics reveal suppressed EEA for coupled ex

SUBMITTER: Sortino L 

PROVIDER: S-EPMC10449935 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature