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Dark modes and Fano resonances in plasmonic clusters excited by cylindrical vector beams

Sancho-Parramon, Jordi; Bosch, Salvador (2012) Dark modes and Fano resonances in plasmonic clusters excited by cylindrical vector beams. ACS Nano, 6 (9). pp. 8415-8423. ISSN 1936-0851

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Control of the polarization distribution of light allows tailoring the electromagnetic response of plasmonic particles. By rigorously extending the generalized multiparticle Mie theory, we show that focused cylindrical vector beams (CVB) can be used to efficiently excite dark plasmon modes in nanoparticle clusters. In addition to the small radiative damping and large field enhancement associated to dark modes, excitation with CVB can give place to unusual phenomenology like the formation of electromagnetic cold spots and the generation of Fano resonances in highly symmetric clusters. Overall, the results show the potential of CVB to tailor the plasmonic response of nanoparticle clusters in a unique way.

Item Type: Article
Uncontrolled Keywords: surface plasmon resonance,; cylindrical vector beams; focused illumination; nanoparticle; plasmon hybridization; subradiance; near-field enhancement; Fano resonance; electromagnetic cold spots
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Physics > Atomic and Molecular Physics
NATURAL SCIENCES > Chemistry > Physical Chemistry
Divisions: Division of Laser and Atomic Research and Development
Project titleProject leaderProject codeProject type
Optical properties of nanostructured films (Optička svojstva nanostrukturnih slojeva)-Hrvoje Zorc098-0000000-3191MZOS
Depositing User: Jordi Sancho Parramon
Date Deposited: 30 Nov 2015 14:02
DOI: 10.1021/nn303243p

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