“In nature, many animals use Bragg reflectors for structural coloration,” said co-author Alon Gorodetsky, UC Irvine associate professor of chemical and biomolecular engineering. “A squid’s ability to rapidly and reversibly transition from transparent to colored is remarkable, and we found that cells containing specialized subcellular columnar structures with sinusoidal refractive index distributions enable the squid to achieve such feats.”  Read More