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Localized surface plasmons in structure and emitter with different concentric metal rings
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Image of FIG. 1.
FIG. 1.

(a) Top view of structure and ASA-PTE. The diameter of the central metal disk is in concentric metal rings; the gap between concentric metal rings and the width of concentric metal rings are independent parameters; side view of (b) structure and (c) ASA-PTE.

Image of FIG. 2.
FIG. 2.

The transmission spectra of structure perforated with different concentric metal rings. (a) The gap between metal rings is fixed at , whereas the metal ring width is an independent variable from 2, 3, . (b) The widths of annular metals are fixed at , whereas the gap is an independent variable from 3, 4, .

Image of FIG. 3.
FIG. 3.

Emission spectra of ASA-PTE with different gaps and annular metal widths at various temperatures. The widths of annular metal widths are fixed at ; the gaps between metallic rings are (a) 3, (b) 4, and (c) . The gaps between metallic rings are fixed at , and the widths of annular metals are (d) 2, (e) 4, and (f) . The dip at indicated by short dashed line is due to the absorption of in the ambient (Ref. 8). The numbers indicate the position of FP modes of order .

Image of FIG. 4.
FIG. 4.

The dispersion relations of ASA-PTE with various parameters of annular metals: (a) , and (b) , . The arrows indicate the position of the FP modes of different orders.


Generic image for table
Table I.

The lattice parameters on top silver layer and experimental emission peak wavelengths of the ASA-PTE due to FP type resonance (unit: ).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Localized surface plasmons in Al∕Si structure and Ag∕SiO2∕Ag emitter with different concentric metal rings