(a) Absorbance for a 1D metamaterial absorber (f = 10 nm, d = 2 μm, g = 850 nm). The solid and dashed curves are respectively obtained with the exact electromagnetic simulation and with the equivalent dielectric model. (b,c) Maps of the modulus of the magnetic and electric fields corresponding to λs = 11 μm. The p-polarized magnetic field is indicated on (b,d). (d,e) Maps of the modulus of the magnetic and electric fields corresponding to de FP resonance λr = 77 μm. Note that (c,e) are zoomed around the slit.