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(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.
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, .
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 .
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.
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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