Fig. 2
a Absorption and reflection spectra of the proposed sensor. Distributions of b the electric field E 1 and c the magnetic field H 1 at the resonant wavelength. Distributions of d the electric field E 0 and e the magnetic field H 0 at the nonresonant wavelength. Parameters: p = 1200 nm, w = 622 nm, l = 420 nm, t 1 = 328 nm, t 2 = 28 nm, and t 3 = 18 nm