Figure 5.

(A) BEM (top) and ωFQ (bottom) isotropic absorption cross-sections σ^abs of different sodium spherical nanodomes with r = 40 Å and R = 50 Å as a function of the height (h) of the dome (25 < h < 45 Å). (B,C) Graphical depiction of the model exploited to explain the plasmonic character of the absorption peaks with co-axial and orthogonal polarizations. (D,E) ωFQ imaginary charges for a Na nanodome with r = 40 Å, R = 50 Å, and h = 45 Å calculated with co-axial and orthogonal polarizations at the PRFs of the two peaks (bonding and anti-bonding) highlighted in (A). Top and bottom views of the dome are depicted. All σ^abs are normalized with respect to the volume of the considered structure.