Fig. 3

Simulated spectra and electric field distributions. a Simulated extinction spectra with large (~396 meV) and small detuning (~19 meV). For the large detuning, the nanoblock size is 150 nm, and the period is 400 nm. For the small detuning, the nanoblock size is 115 nm, and the period is 500 nm. b, c Electric field (|E|) distributions are simulated at 1–4 resonance wavelengths labeled on the extinction spectra