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

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

doi:10.1038/s41377-022-00918-1

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

Light Sci Appl. 2022 Jul 26;11(1):235. doi: 10.1038/s41377-022-00918-1.

Authors

Bao-Ying Wen^#^{1

2}, Jing-Yu Wang^#¹, Tai-Long Shen^#^{1

2}, Zhen-Wei Zhu¹, Peng-Cheng Guan^{1

2}, Jia-Sheng Lin^{1

2}, Wei Peng^{1

2}, Wei-Wei Cai¹, Huaizhou Jin³, Qing-Chi Xu⁴, Zhi-Lin Yang⁵, Zhong-Qun Tian^{1

2}, Jian-Feng Li^{6

7

8}

Affiliations

¹ Department of Physics, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
² Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, 361005, China.
³ Department of Physics, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China. jinhz@xmu.edu.cn.
⁴ Department of Physics, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China. xuqingchi@xmu.edu.cn.
⁵ Department of Physics, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China. zlyang@xmu.edu.cn.
⁶ Department of Physics, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China. li@xmu.edu.cn.
⁷ Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen, 361005, China. li@xmu.edu.cn.
⁸ College of Optical and Electronic Technology, Jiliang University, Hangzhou, 310018, China. li@xmu.edu.cn.

^# Contributed equally.

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.