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. 2018 Sep 1;11(9):1576. doi: 10.3390/ma11091576

Figure 2.

Figure 2

(A–F) Calculated electric field |E2|/|E02| of the Au ring-disk nanostructures at different SPR peaks. H1 = H2 = 10 nm, R1 = 20 nm, R2 = 30 nm, and R3 = 30 nm. The color bars in the logarithmic scale for electric enhancement are shown (the units are (V/m)2, E0 = 1 V/m).