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Science ; 315(5810): 348, 2007 Jan 19.
Article in English | MEDLINE | ID: mdl-17234940

ABSTRACT

The colored appearances of animals are controlled by pigmentation, highly periodic ultrastructure, or a combination of both. Whiteness, however, is less common and is generated by neither of these, because it requires scattering processes appropriate for all visible wavelengths. We report whiteness resulting from a three-dimensional photonic solid in the scales of Cyphochilus spp. beetles. Their scales are characterized by their exceptional whiteness, their perceived brightness, and their optical brilliance, but they are only 5 micrometers thick. This thickness is at least two orders of magnitude thinner than common synthetic systems designed for equivalent-quality whiteness.


Subject(s)
Coleoptera/ultrastructure , Color , Animals , Fourier Analysis , Lasers , Light , Microscopy, Electron, Scanning , Microscopy, Electron, Transmission , Optics and Photonics , Scattering, Radiation
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