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

Authors: Bao-Ying Wen, Jing-Yu Wang, Tai-Long Shen, Zhen-Wei Zhu, Peng-Cheng Guan, Jia-Sheng Lin, Wei Peng, Wei-Wei Cai, Huaizhou Jin*, Qing-Chi Xu*, Zhi-Lin Yang*, Zhong-Qun Tian & Jian-Feng Li*

Abstract: 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.

Full-Link: https://www.nature.com/articles/s41377-022-00918-1