structural coloration
production of colour by microscopically structured surfaces, both as a natural phenomenon and in technology
photonic crystal
periodic optical nanostructure affecting the motion of photons in much the same way as ionic lattices affect electrons in solids
iridescence
property in which fine colors, changeable with the angle of view or angle of illumination, are produced on a surface by the interference of light that is reflected from both the front and back of a thin film