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The Physics of Butterfly Wings
Some butterflies have shiny, vividly colored wings. From different angles you see different colors. This effect is called iridescence. How does it work? It turns out these butterfly wings are made …
• Vinodkumar Saranathana et al, Structure, function, and self-assembly of single network gyroid (I4 1 32) photonic crystals in butterfly wing scales, PNAS 107(2010), 11676–11681. • Ling Lu, Zhiyu Wang, Dexin Ye, Lixin Ran, Liang Fu, John D. Joannopoulos and Marin Soljačić, Experimental observation of Weyl points, Science 349(2015), 622–624. Here, we present a theoretical discovery and detailed numerical investigation of frequency-isolated Weyl points in perturbed double-gyroid photonic crystals along with their complete phase diagrams and their topologically protected surface states.
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