Hoplia coerulea, a porous natural photonic structure as template of optical vapour sensor

Titre traduit de la contribution: Hoplia coerulea, a porous natural photonic structure as template of optical vapour sensor

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Résumé

Natural photonic structures found on the cuticle of insects are known to give rise to astonishing structural colours. These ordered porous structures are made of biopolymers, such as chitin, and some of them possess the property to change colour according to the surrounding atmosphere composition. This phenomenon is still not completely understood. We investigated the structure found on the cuticle of the male beetle Hoplia coerulea (Scarabaeidae). The structure, in this case, consists in a 1D periodic porous multilayer inside scales, reflecting incident light in the blue. The colour variations were quantified by reflectance spectral measurements using water, ethanol and acetone vapours. A 1D scattering matrix formalism was used for modelling light reflection on the photonic multilayer. The origin of the reported colour changes has to be tracked in variations of the effective refractive index and of the photonic structure dimensions. This remarkable phenomenon observed for a non-open but still porous multilayer could be very interesting for vapour sensing applications and smart glass windows.
langue originaleAnglais
titreSPIE Proceedings
Nombre de pages9
Volume9127
Les DOIs
Etat de la publicationPublié - 2 mai 2014
EvénementSPIE Conference - Photonics Europe 2014 - Brussels, Belgique
Durée: 14 avr. 201417 avr. 2014

Une conférence

Une conférenceSPIE Conference - Photonics Europe 2014
PaysBelgique
La villeBrussels
période14/04/1417/04/14

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mots-clés

  • Beetle scale
  • natural photonic crystals
  • photonic bandgap materials
  • structural colour
  • iridescence
  • Coleoptera
  • bioinspiration
  • selective gas/vapour sensor

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