Unexplained high sensitivity of the reflectance of porous natural photonic structures to the presence of gases and vapours in the atmosphere

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Résumé

Structurally coloured natural photonic crystals found in several insects are made of ordered porous chitin structures. In such photonic crystals, colour changes can be induced by relative gas/vapour concentration variations in a mixed atmosphere. For instance, when the composition of the atmosphere changes, the colour of Morpho sulkowskyi buttery is modied. Based on this eect, it is possible to identify closely related gases/vapours. In spite of increasing interests for such sensors, the fundamental mechanisms at the origin of the selective optical response are still not well understood. The point is that refractive index variations resulting from the introduction of a specic gas species in the atmosphere are too small to justify the dramatic changes observed in the optical response. Here, we demonstrate through numerical simulations that indeed gas/vapour-induced refractive index changes are too small to produce a signicant modication of the spectral reectance in a representative 3D periodic model of natural porous nanostructures. For this purpose, we used the rigorous coupled wave analysis (RCWA) method for modelling light scattering from inhomogeneous optical media. The origin of the reported colour changes has therefore to be found in modications of the porous material and their impact on the photonic response.
langue originaleAnglais
titreProc. of SPIE
Pages1-14
Nombre de pages14
Volume8424
Les DOIs
étatPublié - 1 janv. 2012
EvénementSPIE Conference - Photonics Europe 2012 - Bruxelles, Belgique
Durée: 15 avr. 2012 → …

Une conférence

Une conférenceSPIE Conference - Photonics Europe 2012
PaysBelgique
La villeBruxelles
période15/04/12 → …

Empreinte digitale

photonics
vapors
reflectance
atmospheres
sensitivity
color
gases
chitin
refractivity
insects
porous materials
crystals
light scattering
sensors
simulation

Citer ceci

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title = "Unexplained high sensitivity of the reflectance of porous natural photonic structures to the presence of gases and vapours in the atmosphere",
abstract = "Structurally coloured natural photonic crystals found in several insects are made of ordered porous chitin structures. In such photonic crystals, colour changes can be induced by relative gas/vapour concentration variations in a mixed atmosphere. For instance, when the composition of the atmosphere changes, the colour of Morpho sulkowskyi buttery is modied. Based on this eect, it is possible to identify closely related gases/vapours. In spite of increasing interests for such sensors, the fundamental mechanisms at the origin of the selective optical response are still not well understood. The point is that refractive index variations resulting from the introduction of a specic gas species in the atmosphere are too small to justify the dramatic changes observed in the optical response. Here, we demonstrate through numerical simulations that indeed gas/vapour-induced refractive index changes are too small to produce a signicant modication of the spectral reectance in a representative 3D periodic model of natural porous nanostructures. For this purpose, we used the rigorous coupled wave analysis (RCWA) method for modelling light scattering from inhomogeneous optical media. The origin of the reported colour changes has therefore to be found in modications of the porous material and their impact on the photonic response.",
keywords = "natural photonic crystal, nanoarchitecture, Butterfly wing, Bruggeman effective medium, selective gas/vapour sensor, bioinspiration, reflectance spectra, structural colour",
author = "S. Mouchet and O. Deparis and J.-P. Vigneron",
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Unexplained high sensitivity of the reflectance of porous natural photonic structures to the presence of gases and vapours in the atmosphere. / Mouchet, S.; Deparis, O.; Vigneron, J.-P.

Proc. of SPIE. Vol 8424 2012. p. 1-14 842425.

Résultats de recherche: Contribution dans un livre/un catalogue/un rapport/dans les actes d'une conférenceArticle dans les actes d'une conférence/un colloque

TY - GEN

T1 - Unexplained high sensitivity of the reflectance of porous natural photonic structures to the presence of gases and vapours in the atmosphere

AU - Mouchet, S.

AU - Deparis, O.

AU - Vigneron, J.-P.

N1 - Sébastien Mouchet, Olivier Deparis, Jean-Pol Vigneron, "Unexplained high sensitivity of the reflectance of porous natural photonic structures to the presence of gases and vapours in the atmosphere," Proceedings 8424, 842425. doi: 10.1117/12.921784 Copyright 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - Structurally coloured natural photonic crystals found in several insects are made of ordered porous chitin structures. In such photonic crystals, colour changes can be induced by relative gas/vapour concentration variations in a mixed atmosphere. For instance, when the composition of the atmosphere changes, the colour of Morpho sulkowskyi buttery is modied. Based on this eect, it is possible to identify closely related gases/vapours. In spite of increasing interests for such sensors, the fundamental mechanisms at the origin of the selective optical response are still not well understood. The point is that refractive index variations resulting from the introduction of a specic gas species in the atmosphere are too small to justify the dramatic changes observed in the optical response. Here, we demonstrate through numerical simulations that indeed gas/vapour-induced refractive index changes are too small to produce a signicant modication of the spectral reectance in a representative 3D periodic model of natural porous nanostructures. For this purpose, we used the rigorous coupled wave analysis (RCWA) method for modelling light scattering from inhomogeneous optical media. The origin of the reported colour changes has therefore to be found in modications of the porous material and their impact on the photonic response.

AB - Structurally coloured natural photonic crystals found in several insects are made of ordered porous chitin structures. In such photonic crystals, colour changes can be induced by relative gas/vapour concentration variations in a mixed atmosphere. For instance, when the composition of the atmosphere changes, the colour of Morpho sulkowskyi buttery is modied. Based on this eect, it is possible to identify closely related gases/vapours. In spite of increasing interests for such sensors, the fundamental mechanisms at the origin of the selective optical response are still not well understood. The point is that refractive index variations resulting from the introduction of a specic gas species in the atmosphere are too small to justify the dramatic changes observed in the optical response. Here, we demonstrate through numerical simulations that indeed gas/vapour-induced refractive index changes are too small to produce a signicant modication of the spectral reectance in a representative 3D periodic model of natural porous nanostructures. For this purpose, we used the rigorous coupled wave analysis (RCWA) method for modelling light scattering from inhomogeneous optical media. The origin of the reported colour changes has therefore to be found in modications of the porous material and their impact on the photonic response.

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KW - nanoarchitecture

KW - Butterfly wing

KW - Bruggeman effective medium

KW - selective gas/vapour sensor

KW - bioinspiration

KW - reflectance spectra

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