Figure 4From: Effect of the anodization voltage on the pore-widening rate of nanoporous anodic aluminaResults of the optical characterization. (a) Porosity dependence on the pore-widening time. (b) Thickness dependence on the total charge. (c) Effective refractive index of the NAA layer for the wavelength λ = 750 nm as a function of the pore-widening time. The dashed lines are a guide to the eye.Back to article page