我室李剑锋教授在 ACIE 上发表论文：Elucidating Molecule‐Plasmon Interactions in Nanocavities with 2 nm Spatial‐Resolution and at Single‐Molecule Level

文章链接：https://onlinelibrary.wiley.com/doi/10.1002/anie.201906517

摘要：

Fundamental understanding of the subtle interactions between molecules and plasmons is of great significance for the development of plasmon‐enhanced spectroscopic (PES) techniques with ultrahigh‐sensitivity. However, such information still remains unclear due to the complex mechanisms and difficulty in reliably constructing and precisely controlling interactions in well‐defined plasmonic systems. Herein, the interactions in plasmonic nanocavities of film‐coupled metallic nanocubes (NCs) are investigated. Through engineering the spacer layer, molecule‐plasmon interactions were precisely controlled and resolved within 2 nm. Efficient energy exchange interactions between the NCs and the surface within the 1‐2 nm range are demonstrated. Additionally, optical dressed molecular excited states with a huge Lamb shift of ~ 7meV at the single molecule (SM) level were observed. This work clarifies the understanding of the underlying molecule‐plasmon interaction, paving the way for fully manipulating light‐matter interactions at the nanoscale.