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(Color online). Spectral dependence of the SPP transmission coefficient for arrays of Gaussian ridges (height , solid curves) or grooves (, dashed curves) of half-width with three different periods: , 314, and .
(Color online). Spectral dependence of the SPP reflection and transmission coefficients, and of the normalize radiative losses , for arrays (period ) consisting of different number of Gaussian ridges: (a) , , 5, 10, 20, and 40, and (b) , , 2, 3, 5, and 10.
(Color online). Maximum SPP reflection coefficient (at the SPP gap center) as a function of the number of Gaussian defects in the array for ridges (filled symbols) and grooves (hollow symbols) of various sizes: (circles), (squares), (diamonds), and (triangles). The vertical line corresponds to ( being the SPP inelastic length at the gap center on Ag), beyond which ohmic losses may affect the results.
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