Tuning relaxation and nonlinear upconversion of valley-exciton-polaritons in a monolayer semiconductor.

ABSTRACT: Controlling exciton relaxation and energy conversion pathways via their coupling to photonic modes is a central task in cavity-mediated quantum materials research. In this context, the light-matter hybridization in optical cavities can lead to intriguing effects, such as modified carrier transport, enhancement of optical quantum yield, and control of chemical reaction pathways. Here, we investigate the impact of the strong light-matter coupling regime on energy conversion, both in relaxation and upconversion schemes, by utilizing a strongly charged MoSe₂ monolayer embedded in a spectrally tunable open-access cavity. We find that the charge carrier gas yields a significantly modified photoluminescence response of cavity exciton-polaritons, dominated by an intra-cavity like pump s

SUBMITTER: Shan H 

PROVIDER: S-EPMC12583619 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature