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

Sébastien Mouchet; Bao-Lian Su; Tijani Tabarrant; Stéphane Lucas; Olivier Deparis

doi:10.1117/12.2050409

2 May 2014 Hoplia coerulea, a porous natural photonic structure as template of optical vapour sensor

Sébastien Mouchet, Bao-Lian Su, Tijani Tabarrant, Stéphane Lucas, Olivier Deparis

Proceedings Volume 9127, Photonic Crystal Materials and Devices XI; 91270U (2014) https://doi.org/10.1117/12.2050409
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

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.

Citation Download Citation

Sébastien Mouchet, Bao-Lian Su, Tijani Tabarrant, Stéphane Lucas, and Olivier Deparis "Hoplia coerulea, a porous natural photonic structure as template of optical vapour sensor", Proc. SPIE 9127, Photonic Crystal Materials and Devices XI, 91270U (2 May 2014); https://doi.org/10.1117/12.2050409

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