Figure 2.

(a) Absorbance inside silicon and silver nanoparticles. Inset: nanoparticle array; particles are shaded to show the region of absorbance calculations. (b) Spectral dependences of the reflectance for bare substrate, for silver, and silicon coatings. Inset: nanoparticle array; dashed line right on top of nanoparticles shows where calculations were done. The wavelength of resonant transmission and suppression of reflection for Si-NPC is denoted as λ_p. (c) Transmittance through the silicon surface without coating (dash-dot black line), or with silicon- (solid red line) and silver- NPC (dashed blue line). Inset: nanoparticle array; dashed line right beneath nanoparticles shows the place of calculation of transmittance in the direction shown by the arrows (losses inside the silicon substrate do not directly affect transmitted wave). The calculations in (a–c) were performed for Ag-NPC R_Ag = 30 nm, d_Ag = 125 nm and for Si-NPC R_Si = 60 nm, d_Si = 250 nm.