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. 2015 Oct 1;5:14788. doi: 10.1038/srep14788

Figure 7. Refractive-index sensing of the BNAs with MIM configuration based on parallel coupling.

Figure 7

(a) Normalized reflection dips of the BNAs (t = 5 nm, a⊥ = 400 nm and a|| = 900 nm, the gap size of the bowtie nanoantennas is 10 nm) as a function of the superstrate refractive index ranging from 1.0 to 1.4. (b) Zoom-in reflection spectra of the BNAs (t = 5 nm, a⊥ = 400 nm and a|| = 1,030 nm, the gap size of the bowtie nanoantennas is 10 nm) when superstrate refractive index changes from 1.0 to 1.001.