Figure 1
From: Broadband multiple responses of surface modes in quasicrystalline plasmonic structure

The geometry of the photonic QC/metal film structures and the coordinate configuration.
I, II and III are the photonic QC with the cross section as Fig. 2(a), the metal layer and the substrate, respectively. (θ, φ) represents the incident direction and ψ represents the polarization. In this paper, the spectra is calculated with θ = ψ = π/2.