Figure 4
From: Bio-inspired broadband absorbers induced by copper nanostructures on natural leaves
(a) Reflectance spectra, (b) Scattering spectra of Phanera pupurea leaf: (blue line) Phanera pupurea leaf without copper films, covered by sputtered copper film (black line) 25-nm-thick, and (red line) 50-nm-thick.
