Figure 2. The analysis of hybrid modes and Fano resonance.
Extinction spectra of the heterodimer (l = 240 nm, d = 60 nm) with g = 20 nm under oblique incidence θ = π/4 with linearly polarized light. (a) Extinction spectra of individual nanorices (blue, Au nanorice; red, Ag nanorice) and the surface charge density distributions for dipole and quadrupole modes of Ag nanorice. (b) Extinction spectrum of Au-Ag nanorice heterodimer. (c) Surface charge density distributions for hybridized plasmon modes (marked by numeral in (b)) (top: Au, bottom: Ag). (d) Energy-level diagram describing the plasmon hybridization of the Au-Ag heterodimer.