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Tuning multiple Fano resonances in plasmonic pentamer clusters
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10.1063/1.4800563
/content/aip/journal/apl/102/13/10.1063/1.4800563
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/13/10.1063/1.4800563
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Geometry of a pentamer composed of nanorings. (b) Evolution of the extinction spectra versus center ring radius R when the polarization is along the x-axis, and the (c) y-axis, where the surrounding ring radius r = 75 nm, the width w = 30 nm, the separation s = 20 nm, the angle between the center and the surrounding rings θ = 60°, the thickness t = 40 nm, and the environment refractive index n = 1.33.

Image of FIG. 2.
FIG. 2.

Near field enhancement and current density vector distributions at the spectral positions of the superradiant bright mode and the three kinds of Fano resonances. (a) The bright mode with incident wavelength λ = 830 nm and (b) λ = 1360 nm. (c) The first Fano resonance with R = 60 nm and (d) R = 90 nm. (e) The second Fano resonance with R = 80 nm and (f) R = 90 nm. (g) The third Fano resonance with R = 60 nm and (h) R = 70 nm. The inset in Fig. 2(d) schematically shows the other normal mode of B 3u irreducible representation.

Image of FIG. 3.
FIG. 3.

Relationships between the extinction spectra and θ. (a) R = 60 nm, (b) R = 90 nm. The other parameters are the same as those in Fig. 1 .

Image of FIG. 4.
FIG. 4.

Near field enhancement and current density vector distributions of the Fano resonances with different θ. (a) The second Fano resonance with θ = 90°, R = 60 nm. (b) The third Fano resonance with θ = 70°, R = 60 nm. (c) The second Fano resonance with θ = 90°, R = 90 nm. (d) The third Fano resonance with θ = 50°, R = 90 nm.

Image of FIG. 5.
FIG. 5.

(a) Extinction spectra of the pentamers composed of split nanorings, where the gap size of split rings g = 30 nm and the other parameters are the same as those in Fig. 1 . (b) Near field properties of the second Fano resonance, (c) the third Fano resonance, and (d) the fourth Fano resonance.

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/content/aip/journal/apl/102/13/10.1063/1.4800563
2013-04-04
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tuning multiple Fano resonances in plasmonic pentamer clusters
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/13/10.1063/1.4800563
10.1063/1.4800563
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