Figure 5.

Calculated field maps for a) one sphere b–d) two touching spheres with a radius of 125 nm of amorphous SiO₂ at 1142 cm⁻¹. For a–c) light is incident perpendicular, along the line of view and the arrows indicate the polarization direction. In case of d) light is incident from the right. The lower panel shows the corresponding absorption cross section spectra (in case of a) twice that of the single sphere).