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Understanding the dispersion of coaxial plasmonic structures through a connection with the planar metal-insulator-metal geometry
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10.1063/1.3148692
/content/aip/journal/apl/94/23/10.1063/1.3148692
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/23/10.1063/1.3148692
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Propagating modes supported by a structure with coaxial cross-section for a plasmonic metal without loss. (a) Dispersion diagram , where is the real propagation vector along the longitudinal axis of the waveguide and is the radial frequency. (b) Cutoff frequency of the modes vs angular momentum . The curves are obtained from the analytical expression (solid lines) and from a numerical FDFD method (filled circles). Inset shows the geometry and identifies the average radius and the width of the dielectric ring, where is the plasma wavelength of the metal.

Image of FIG. 2.
FIG. 2.

Electric field amplitudes of the first six lowest-order modes supported by a coaxial structure at their cutoff frequencies (, , , , , and ). The parameter values for the coaxial structure and the material model are the same as those in Fig. 1.

Image of FIG. 3.
FIG. 3.

Dispersion diagram and of the lowest-order modes supported by a coaxial structure for tabulated properties of silver that include material losses. and are the real and imaginary parts of the complex propagation vector along the longitudinal axis of the waveguide, and is the radial frequency. The curves are obtained from the analytical expression (black lines) and from a numerical FDFD method (filled circles). The average radius and the width .

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/content/aip/journal/apl/94/23/10.1063/1.3148692
2009-06-09
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Understanding the dispersion of coaxial plasmonic structures through a connection with the planar metal-insulator-metal geometry
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/23/10.1063/1.3148692
10.1063/1.3148692
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