Transition from isolated to collective modes in plasmonic oligomers.
basic_science · Level V
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- Record sourced from PubMed, PMID 20586409.
- Also identified by DOI 10.1021/nl101938p.
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Abstract
We demonstrate the transition from isolated to collective optical modes in plasmonic oligomers. Specifically, we investigate the resonant behavior of planar plasmonic hexamers and heptamers with gradually decreasing the interparticle gap separation. A pronounced Fano resonance is observed in the plasmonic heptamer for separations smaller than 60 nm. The spectral characteristics change drastically upon removal of the central nanoparticle. Our work paves the road toward complex hierarchical plasmonic oligomers with tailored optical properties.