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.

中文翻译：

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以 1 nm 空间分辨率操纵等离子体纳米腔中的光与物质相互作用

等离子体纳米腔和激子在亚衍射极限下的光-物质相互作用是纳米光子学的核心研究领域。_{在这里，我们通过耦合 MoS 2}的 A 激子和间隙模式等离子体纳米腔，展示了在 ~1 nm 空间分辨率下光物质相互作用的垂直分布。此外，我们观察到显着的光致发光（PL）增强因子高达 2800 倍，这归因于 Purcell 效应和间隙模式等离子体纳米腔中的大局部状态密度。同时，理论计算得到了很好的重现并支持了实验结果。