Figure 2.

(a) Numerically calculated absorption spectra at normal incidence, with geometrical parameters of p_x = p_y = 800 nm, L = 500 nm, d = 200 nm, and w = 50 nm. (b) Current distributions at the wavelength of λ₁ on the xz plane along the white dotted line in Figure 3a. The colors represent the current strength, and the red arrows give the current directions.