LIGHT TRUMPS ELECTRONS in information communication. This is an immense statement with many applications. Photonic crystals are like electrical insulators for light. And it all began with the seemingly frivolous, or at least innocent, fascination by scientists going back to Newton, for iridescent colors in nature.
http://mpalffy.lci.kent.edu/Optics/Presentations%202012/Photonic%20Crystals%20Libo%20Weng.pdf