Photonic crystal scales with a diamond-based lattice from the weevilLamprocyphus augustus are transformed into a high-dielectric titania replica by a biotemplating double-imprint route. Multidirectional optical reflectance spectroscopy of the replicated structure gives an angle-independent reflection band in the visible spectrum, in agreement with photonic band structure calculations, which reveal the formation of a complete photonic bandgap at visible frequencies.
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