期刊
NANO LETTERS
卷 18, 期 4, 页码 2209-2216出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b04385
关键词
Plasmon-induced magnetic resonance (PIMR); Fano resonance; hot spots; dark-field spectrum; SERS; surface plasmons
类别
资金
- National Science Foundation of China [11474239, 21673192]
- MOST [2016YFA0200601, 2017YFA0204902]
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.
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