Plasmonic Coupling in Three-Dimensional Au Nanoparticle Assemblies Fabricated by Anodic Aluminum Oxide Templates

Figure 4

(a) Calculated extinction spectra of 3D heptamers whose central NP is moved along the vertical direction, as illustrated in (b) and (c). The white dashed lines and the red arrows indicate the planes containing the center of oNPs and the direction of the incident light, respectively.