Figure 7

Near-field enhancement w.r.t. the incident field for 2D hexagonal monolayer array of 20 nm Au nanoparticle in dielectric medium (n = 1.33) for different interparticle gaps, d: (a) 1 nm, (b) 4 nm, (c) 16 nm and (d) 64 nm. (e) and (f) Shows the near-field profiles at vertical polarization for interparticle gaps 1 and 4 nm respectively. At normal incidence i.e. θ = 0°, (a–d) are for horizontal polarization i.e. φ = 0° and vertical polarization i.e. φ = 90°.