Figure 4: Extinction (black), absorption (red), and scattering (blue) spectra calculated for Ag nanoparticles of different shapes: (a) sphere, (b) cube, (c) tetrahedron, (d) octahedron, and (e) triangular plate. (f) Extinction spectra of rectangular bars with aspect ratios of 2 (black), 3 (red), and 4 (blue). Reprinted with permission from [13]. Copyright 2011 Elsevier. 
