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. 2019 Oct 11;19(20):4394. doi: 10.3390/s19204394

Figure 1.

Figure 1

(a) SEM image and (b) transmission spectra of a gold nanohole array fabricated by interference lithography (IL) with a period of ʌ = 500 nm. The plasmonic peak of resonance order (1,1) presents a maximum at 615 nm.