Figure 4: Reflectivity of 1D groove arrays.
From: Plasmonic black gold by adiabatic nanofocusing and absorption of light in ultra-sharp convex grooves
Reflectivity spectra of the s-polarized (along the x axis) and p-polarized (along the y axis) light for groove arrays in palladium and nickel and the groove geometry (Fig. 1a) with the parameters a=r=δ=10 nm, H=500 nm, Λ=250 nm, and α=θ=0° are shown with red (nickel) and black (palladium) dashed (s-polarization) and solid (p-polarization) lines, demonstrating that low (<10%) reflectivity levels can be achieved with the grooves fabricated in metals with larger SP losses using relatively low-resolution (~10 nm) techniques. Reflectivity spectra for flat nickel and palladium surfaces are shown with dash-dotted lines.
