Fig. 1. Comparison of LSPR and SLR in transmission spectra and electric field intensity enhancement. (a)(b) Spectra for a single particle and a periodic 1D chain, the gold particles are 80 nm in radius made in air environment, the period in the chain is 620 nm, and the total number of particles in the chain is 1000^[10]; (c) electric field intensity distribution on surface of a single gold disk of 180 nm in diameter and 40 nm thick at λ=930 nm (bottom) and of a gold disk in a 2D array with P=640 nm at λ=982 nm (top)^[14]

Fig. 2. SLR in a rectangular array of gold nanoparticles^[16]. (a) Schematic of the array; (b) measured (black dots) and simulated (red line) transmission spectra, and inset is the zoomed plot of the high-Q region; (c) effect of array size and coherence of light source

Fig. 3. High-quality plasmonic SLR from annealed gold nanoparticle arrays^[17]. (a) Scheme of annealing setup; (b) SEM images of arrays before and after annealing process; (c) measured transmission spectra of untreated arrays and annealed arrays with period P=600 nm

Fig. 4. Gold nanoparticle (GNP) arrays fabricated by template-assisted chemical method^[18]. (a) Schematic of the fabrication process; (b) photograph and SEM images of the sample; (c) measured transmission spectra of GNP array under linearly polarized light; (d) calculated near-filed distribution of |E|² at λ_SLR=870 nm

Fig. 5. SLR in complex lattices. (a) SEM image of asymmetric disc dimer array with a lattice constant of 450 nm^[19]; (b) schematic of bipartite nanoparticle arrays^[20]; (c) schematic of complex lattices built by removing nanoparticles periodically^[22]

Fig. 6. SLR produced by periodically shifting the whole rows in a nanoparticle array^[23]. (a) Transmission spectra of three different lattice arrangements (i), (ii), and (iii) with their corresponding schematic of lattices; (b) E_x field profiles at λSLR'=1040 nm in lattices (ii) and (iii)

Fig. 7. SLR from high-index dielectric nanoparticle arrays^[11,13]. (a) Scattering efficiency spectra of Si spherical particles with the radius R located in air; (b) extinction and scattering spectra of a Si particle with R=65 nm; (c) schematic of the square array of Si cylinders on a SiO₂ substrate embedded within polymer; (d) electric-field-intensity enhancement spectra of a P=700 nm array, averaged over three different horizontal monitor planes, insets are field-magnitude enhancement maps at resonance peaks; (e) electric-field-intensity enhancement spectra of a P=1035 nm array; (f) electric-field-intensity enhancement spectra of a P=1500 nm array

Fig. 8. BIC in arrays of double dielectric particles and its connection with SLR^[34]. (a) Simulated reflectance spectra, the insets display the near-field distribution for asymmetry parameter α=0.8 and 0.05; (b) phase distribution color map of asymmetry BICs; (c) design for breaking the symmetry

Fig. 9. SLR supported by mirror-backed dielectric nanopillar arrays^[38,40]. (a) Schematic showing SLR supported by a periodic array of dielectric pillars on a gold film; (b) SEM image of SU-8 pillar array (lattice spacing is 720 nm) on a gold-coated silicon substrate; (c) reflection spectra at normal incidence and the narrow linewidth characteristic at λ_I corresponds to the lattice resonance mode on the medium surface; (d) electric field intensity distribution on the top surface and cross section of the pillar array at λ_SLR=755 nm; (e) reflection spectra of SLR supported by TiO₂ pillar array (lattice spacing is 560 nm) on a gold-coated silicon substrate in water; (f) reflection spectra around SLR supported by TiO₂ pillar array (lattice spacing is 560 nm) on a gold-coated silicon substrate in different media; (g) relation between λ_SLR and background refractive indices of SLR supported by TiO₂ pillar array (lattice spacing is 560 nm) on a gold-coated silicon substrate

Fig. 10. High-Q SLR supported by mirror-backed dielectric nanopillars with medium refractive index (P=720 nm)^[42]. (a)(d) Reflectance spectra,quality factors, and FWHM of SLR for different refractive index; (b)(e) reflectance spectra,quality factors, and FWHM of SLR for different diameters; (c)(f) reflectance spectra, quality factors, and FWHM of SLR for different height

Fig. 11. SLR supported by mirror-backed dielectric dimer arrays^[37]. (a) Schematic of dielectric-dimer-on-mirror structures; (b) electric field intensity distribution at SLR