Fig. 1. (a) Frequency diagram for a system supporting Fano-like interference. There exist a bright mode,which can couple to the incident light, and a dark mode, which does not couple to the incident light; (b) the excitation of bright mode at ω can occur by two paths with degenerate energies; (c) energy transfer between the bright and dark modes takes place by nearfield coupling, with coupling constant κ[33]; (d) schematic view of the external force driven spring oscillator system (the coupling relation

Fig. 2. Plasmonic Fano resonance excited by monomer disk-like nanostructure. (a) Simulation of the extinction (solid line), scattering (dashed line), and absorption spectra (dot line) for a silver nanodisk that exhibits typical Fano-like resonance. (a1)-(a3) Simulation of the surface charge distribution[35]; (b) the silicon disk obtained multiple Fano resonance with the change of its diameter[36]; (c) normalized extinction spectra (left) of a symmetric Ag (red) and symmetry broken (blue) nanodisks under

Fig. 3. Plasmonic Fano resonance excited by dimer disk-like structure. (a) Normalized absorption cross sections of the silver and gold nanoparticles. The dashed and solid lines correspond to the case of isolated particles or particles within the dimer, respectively[43]; (b) simulated optical extinction spectra (using unpolarized light) for the Au∶Ag heterodimers with RAu∶ RAg ratios of (b1) 1∶1, (b2) 3∶1, and (b3) 6∶1, and different interparticle separations[44]; (c) hybridization diagram illustrating t

Fig. 4. Plasmonic Fano resonance excited by polymer disk-like structure. (a) Scattering spectrum of the trimer at normal incidence of plane wave. Illustration of spatial distributions of Ez component on the top surface of the trimer excited at 800 nm and 916 nm wavelengths, corresponding to two subradiant modes[26]; (b1) simulated spectra of the monomer and quadrumer at normal incidence; calculated charge distribution of the quadrumer at wavelengths of (b2) 640 nm and (b3) 780 nm by FDTD simulation[48];