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Controllable plasmonic antennas with ultra narrow bandwidth based on silver nano-flags
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10.1063/1.4759122
/content/aip/journal/apl/101/15/10.1063/1.4759122
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/15/10.1063/1.4759122
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Figures

Image of FIG. 1.
FIG. 1.

(a) Illustration of the configurations of silver nanostructures. The inset shows that the tips of the nanoplate and the nano-flag are rounded at a radius of R = 5 nm. (b) Curves a–f represent the LSPR spectra of a silver nanoplate with side width W = 150, 200, 210, 250, 275, and 300 nm, respectively. The inset shows a central cross-sectional view of the normalized electric-field |E| distribution of a nanoplate with W = 150 nm at resonance. (c) Curves a and b plot the relationship between the maximum value of the amplitude of electric-field |E max| and the wavelength for a silver nanowire with length L = 300 nm and 2 μm, respectively. The inset shows the |E| distribution of a silver nanowire with L = 300 nm at resonance. (d) Curves a–c plot the relationship between |E max| and the wavelength for short nano-flags (L = 300 nm) with W = 150, 200, and 250 nm, respectively. The insets show the |E| distribution of a nano-flag with L = 300 nm and W = 150 nm at its two resonance wavelengths λ = 830 nm (upper) and 1348 nm, respectively. (e) |E max| distribution of nanostructures at resonance as a function of θ. Curves a and b are for a silver nanoplate with W = 150 nm at λ = 900 nm, and a silver nanowire with L = 300 nm at λ = 810 nm. Curves c and d show the calculated results for a short nano-flag (L = 300 nm, W = 150 nm) at λ = 830 and 1348 nm, respectively.

Image of FIG. 2.
FIG. 2.

(a) Curves a–c plot the relationship between |E max| and the wavelength for long nano-flags (L = 2 μm) with W = 150, 200, and 275 nm, respectively. (b) Curves a–c show the relationship between |E max| and the wavelength for long nano-flags (L = 2 μm) with W = 210, 250, and 310 nm, respectively. The inset in (b) illustrates the position of the focused incident light spot in the simulation model for the excitation of the long nano-flags.

Image of FIG. 3.
FIG. 3.

Comparison of the |E| field distribution of a nano-flag along a central cross-section with L = 2 μm and W = 250 nm at different incident rotation angles and wavelengths. The wavelength of the incident light is 1440 nm (off resonance) for (a)–(c) and 1259.5 nm (resonant wavelength) for (d)–(f).

Image of FIG. 4.
FIG. 4.

(a) Polarization-dependent resonance spectra of a long nano-flag with L = 2 μm and W = 150 nm at θ = 90°, 30°, and 0° are shown in curves a–c, respectively. The inset shows |E max| of the long nano-flag as a function of θ at three resonance wavelengths λ = 831, 890, and 980 nm, respectively. (b) Curves a–c correspond to the spectra of a long nano-flag with L = 2 μm and W = 250 nm at θ = 90°, 30°, and 0°, respectively. The half width (FWHM) of the resonance band is highlighted using arrows. The inset shows |E max| as a function of θ at the resonance wavelength λ = 1259.5 nm.

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/content/aip/journal/apl/101/15/10.1063/1.4759122
2012-10-12
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Controllable plasmonic antennas with ultra narrow bandwidth based on silver nano-flags
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/15/10.1063/1.4759122
10.1063/1.4759122
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