Figure 2

Colour tuneability in NAA-DBRs.
(a) Digital pictures of NAA-DBR photonic films produced in this study by modifying Tp and Tan (NB: aluminium substrates were electrochemically anodised through a circular window of 1 cm in diameter). (b) Schematic illustration showing how the different fabrication parameters make it possible to tune the colour of the resulting NAA-DBR film across the UV-visible-NIR spectrum by engineering the interaction light-matter.