Manipulating the light-matter interactions in plasmonic nanocavities at 1 nm spatial resolution

摘要

The light-matter interaction between plasmonic nanocavity and exciton at the sub-diffraction limit is a central research field in nanophotonics.Here,we demonstrated the vertical distribution of the light-matter interactions at~1 nm spatial resolution by coupling A excitons of MoS2 and gap-mode plasmonic nanocavities.Moreover,we observed the significant photoluminescence(PL)enhancement factor reaching up to 2800 times,which is attributed to the Purcell effect and large local density of states in gap-mode plasmonic nanocavities.Meanwhile,the theoretical calculations are well reproduced and support the experimental results.