期刊
PHYSICAL REVIEW B
卷 79, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.125439
关键词
gold; nanoparticles; near-field scanning optical microscopy; plasmons
资金
- Department of Industry of the Basque Government [FIS2007-66711-C01-01]
- Spanish Ministry of Education and Science
We identify weak and strong coupling regimes between a near-field probing tip and a plasmonic sample by imaging plasmon-resonant gold nanodisks with scattering-type scanning near-field optical microscopy (s-SNOM). By means of rigorous electrodynamical calculations based on a model system, we find that in the weak coupling regime, s-SNOM can be applied for direct mapping of plasmonic nanoantenna modes, while in the strong coupling regime, the near-field probe allows for high-precision opto-mechanical control of the antenna response.
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