Figure 4.

Extinction cross sections for silver nanospheres: We compare the extinctions for nanospheres of different radius (a = 8 nm and a = 20 nm) and with background permittivity ϵ_B = 2.25. Blue and orange dashed lines represent quasi-static extinction cross sections for a = 8 nm and a = 20 nm, while green and purple solid lines represent modified long-wavelength approximation (MLWA) extinction cross sections for a = 8 nm and a = 20 nm, respectively. As we see, the divergence between quasi-static and MLWA approximations grows with the size of nanoparticles.