title: Reflectivity of the gyroid biophotonic crystals in the ventral wing scales of the Green Hairstreak butterfly, Callophrys rubi.
abstract: We present a comparison of the computer simulation data of gyroid nanostructures with optical measurements (reflectivity spectra and scattering diagrams) of ventral wing scales of the Green Hairstreak butterfly, Callophrys rubi. We demonstrate that the omnidirectional green colour arises from the gyroid cuticular structure grown in the domains of different orientation. We also show that this three-dimensional structure, operating as a biophotonic crystal, gives rise to various polarization effects. We briefly discuss the possible biological utility of the green coloration and polarization effects.
authors.affiliation: EMBD, Vlasakker 21, Wommelgem, Belgium.
authors.forename: K
authors.initials: K
authors.lastname: Michielsen
authors.forename: H
authors.initials: H
authors.lastname: De Raedt
authors.forename: D G
authors.initials: DG
authors.lastname: Stavenga
mesh_terms: D000818:Animals; D001672:Biocompatible Materials; D002080:Butterflies / Q000033:anatomy & histology / Q000502:physiology*; D003116:Color; D003198:Computer Simulation; D003460:Crystallization; D008954:Models, Biological; D049329:Nanostructures; D055095:Optics and Photonics; D017785:Photons; D010858:Pigmentation; D012031:Refractometry; D014921:Wings, Animal / Q000033:anatomy & histology / Q000502:physiology*
chemical_list: D001672:Biocompatible Materials