Fig. 5.

Comparison of the absorption C _abs (red lines) and scattering C _scat (black lines) cross sections calculated for different models of the dielectric function; dashed lines: for ε _Di(ω, R); solid lines: for ε ^(Au)(ω, R) for gold nanospheres with the radius (a) R = 5 nm and (b) R = 50 nm embedded in water. Vertical solid and dashed lines show correspondingly the position of LSP resonance frequencies ${\omega }_l^{\prime }\left(R\right)$ resulting from the dispersion relation (9) for both models of the dielectric function