期刊
NANO LETTERS
卷 10, 期 7, 页码 2694-2701出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl1016392
关键词
Plasmon; Fano resonance; nanoshell; dark field; harmonic oscillator; coherent phenomena
类别
资金
- Robert A Welch Foundation [1220, C-1222]
- Department of Defense National Security Science and Engineering Faculty [N00244-09-0067]
- NSF [EIA-0216467]
A nanoparticle consisting of a dielectric (SiO2) and metallic (Au) shell layer surrounding a solid Au nanoparticle core can be designed with its superradiant and subradiant plasmon modes overlapping in energy, resulting in a Fano resonance in its optical response Synthesis of this nanoparticle around an asymmetric core yields a structure that possesses additional Fano resonances as revealed by single particle dark field microspectroscopy A mass-and-spring coupled oscillator model provides an excellent description of the plasmon interactions and resultant optical response of this nanoparticle
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