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Maximum enhancement that can be reached by nanoparticles of different materials characterized with at . Optimum enhancements for ideal nanoparticles with are shown by the solid line. Stars depict the maximum enhancement by real metals and dielectrics.
Optimum (a) radius and (b) surface coverage of the nanoparticles maximizing the enhancement, as functions of . The optimum characteristics of ideal nanoparticles are shown by the solid lines. The shaded region shows the range where the ideal nanoparticles result in nonpositive effects.
Spectral absorption rates of the layer and the nanoparticle array (the solid lines) optimized for (a) Ag, (b) Au, (c) Cu, (d) , (e) SiC, and (f) nanoparticles. The reference cell response is plotted as the dashed line; the dash-dotted lines show the contribution of the nondispersive term .
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