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Proceedings Paper

Hoplia coerulea, a porous natural photonic structure as template of optical vapour sensor
Author(s): Sébastien Mouchet; Bao-Lian Su; Tijani Tabarrant; Stéphane Lucas; Olivier Deparis
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Paper Abstract

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.

Paper Details

Date Published: 2 May 2014
PDF: 9 pages
Proc. SPIE 9127, Photonic Crystal Materials and Devices XI, 91270U (2 May 2014); doi: 10.1117/12.2050409
Show Author Affiliations
Sébastien Mouchet, Univ. of Namur (Belgium)
Bao-Lian Su, Univ. of Namur (Belgium)
Univ. of Cambridge (United Kingdom)
Tijani Tabarrant, Univ. of Namur (Belgium)
Stéphane Lucas, Univ. of Namur (Belgium)
Olivier Deparis, Univ. of Namur (Belgium)

Published in SPIE Proceedings Vol. 9127:
Photonic Crystal Materials and Devices XI
Sergei G. Romanov; Gabriel Lozano; Dario Gerace; Christelle Monat; Hernán Ruy Míguez, Editor(s)

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