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Experimental transmittance spectra at normal incidence of plasmonic meta-molecule arrays made with 30 nm Au nanoparticles for lattice parameters (a) 600 and (b) 780 nm. The blue arrows indicate the fwhm of each resonance. The RAs are also indicated by arrows: (±1, 0), (0, ± 1) (black), (±1, ± 1) (red), (±2, 0), (0, ± 2) (green). Angle-resolved transmittance map measured with s-polarized incident light for samples with lattice parameter 600 nm (c) and 780 nm (d).
