Figure 4.

The dependence of the extinction spectra of two dielectric-core-gold-shell nanocylinder pairs on dimensions. (a) For different gap widths between the nanocylinders with the pair distance p of 20 nm, (b) for different pair-distances between the nanocylinder pairs with the gap width of 20 nm, (c) for different dielectric constant of the dielectric cores, (d) for different surrounding medium.