Résumé
| langue originale | Anglais |
|---|---|
| titre | Proc. of SPIE |
| Pages | 1-14 |
| Nombre de pages | 14 |
| Volume | 8424 |
| Les DOIs | |
| état | Publié - 1 janv. 2012 |
| Evénement | SPIE Conference - Photonics Europe 2012 - Bruxelles, Belgique Durée: 15 avr. 2012 → … |
Une conférence
| Une conférence | SPIE Conference - Photonics Europe 2012 |
|---|---|
| Pays | Belgique |
| La ville | Bruxelles |
| période | 15/04/12 → … |
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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 conférence › Article 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.
KW - natural photonic crystal
KW - nanoarchitecture
KW - Butterfly wing
KW - Bruggeman effective medium
KW - selective gas/vapour sensor
KW - bioinspiration
KW - reflectance spectra
KW - structural colour
UR - http://www.scopus.com/inward/record.url?scp=84863539224&partnerID=8YFLogxK
U2 - 10.1117/12.921784
DO - 10.1117/12.921784
M3 - Conference contribution
AN - SCOPUS:84863539224
SN - 9780819491169
VL - 8424
SP - 1
EP - 14
BT - Proc. of SPIE
ER -