Figure 1

Transmission electron microscopy (TEM) image showing a self-assembled Au nanoparticle chain network deposited on a glass substrate (see Ref. 22).Reuse & Permissions

Figure 2

(Color online) LDOS maps computed near gold nanoparticles (30 nm in diameter) randomly deposited on a glass surface. The operating wavelength is 530 nm and all the data are normalized with respect to the LDOS computed in the absence of any particle. (A) Side view of a single gold sphere supported by a planar sample (the dashed line is used to define the observation plane height); (B) total LDOS map $\rho \left(x,y,Z_0,\omega \right)$ computed in the plane $Z_0=60\text{nm}$; (C) surface LDOS map ${\rho }_x\left(x,y,Z_0,\omega \right)+{\rho }_y\left(x,y,Z_0,\omega \right)$ calculated for $Z_0=60\text{nm}$ (Inset: perspective view computed near a single particle); (D) same as (C) but for the partial LDOS along the $OZ$ direction ${\rho }_z\left(x,y,Z_0,\omega \right)$.Reuse & Permissions

Figure 3

(Color online) (I) TEM image of a planar PNN composed of monoparticle chains of 13 nm diameter gold beads deposited on a glass surface. Three different sites, labeled (A), (B), and (C), have been selected for the LDOS computation. (II) Spectra of the normalized total LDOS computed at these three sites (A), (B), and (C).Reuse & Permissions

Figure 4

(Color online) Spatial variation in the LDOS map computed over the network of Fig. 1. The maps have been computed in three consecutive planes $\left(Z=\text{constant}\right)$ parallel to the sample: (A) $Z=110\text{nm}$, (B) $Z=70\text{nm}$, (C) $Z=32\text{nm}$, and (D) geometry of the sample. The wavelength is 530 nm and the data are normalized with respect to the local density of states computed in the absence of any metal chain.Reuse & Permissions