Figure 2
Optical spectra and the near-field details for different frequency.
(a) The σSCS (red line) and σACS (blue dashed line) spectra of the PDA with L = 90 nm, R = 50 nm, d = 20 nm and εload = 12. The red dots are results calculated by the FEM. (b–f) The electric field amplitude |E| at xoz plane for CM11, AM1, CM10, AM2 and CM20 in order. (h–l) The out-of-plane electric fields Ex (colors) and the in-plane magnetic field (arrows) at the yoz plane across the dielectric layer. (m–q) The corresponding surface charge distribution.
