Femtosecond tracking of surface reactions
Plasmonic nanocavity enhancement boosts femtosecond stimulated Raman scattering signals by up to a million-fold, enabling in-situ observation of transient structural evolution of surface-adsorbed molecules at femtosecond timescales.
Sun, Gang · He, Yuhan · Hu, Ling Yun · Yang, Jing · Liu, Huijie · Zhang, Xiaguang · Lin, Yin · Shi, Zhong Hao · Yang, Ye · Yao-Hui, Wang · Zhang, Hua · Liu, Jinxuan · Shisheng, Zheng · Gu, Yu · Wang, Zhaohui · Li, Jianfeng
Nature Communications 2025
Maximum enhancement factor of ~10⁶
In-situ monitoring of intramolecular twisting of malachite green within 100 fs
Strong localized plasmonic field accelerates the twisting process