Title: Plasmon-Induced Magnetic Resonance Enhanced Raman Spectroscopy

Authors: Shu Chen, Yuejiao Zhang, Tien-Mo Shih, Weimin Yang, Shu Hu, Xiaoyan Hu, Jianfeng Li*, Bin Ren, Bingwei Mao, Zhilin Yang*, and Zhongqun Tian

Abstract:

Plasmon-induced magnetic resonance has shown great potentials in optical metamaterials, chemical (bio)-sensing, and surface-enhanced spectroscopies. Here, we have theoretically and experimentally revealed (1) a correspondence of the strongest near-field response to the far-field scattering valley and (2) a significant improvement in Raman signals of probing molecules by the plasmon-induced magnetic resonance. These revelations are accomplished by designing a simple and practical metallic nanoparticle–film plasmonic system that generates magnetic resonances at visible-near-infrared frequencies. Our work may provide new insights for understanding the enhancement mechanism of various plasmon-enhanced spectroscopies and also helps further explore light-matter interactions at the nanoscale.

Full-Link: https://pubs.acs.org/doi/10.1021/acs.nanolett.7b04385