Structural fluorescence in the butterfly Morpho sulkowskyi (Nymphalidae)

Eloise Van Hooijdonk, Carlos Barthou, Jean-Pol Vigneron, Serge Berthier

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

Résumé

Evolution and natural selection have generated complexity and efficiency in all living families. Morpho sulkowskyi - a butterfly from Neotropic ecozone (South America) and belonging to the Nymphalidae family - concentrates on its wings distinct but complementary features contributing to its exceptional visual attraction: i) the wings are predominantly white but ii) present a bright blue metallic flash due to an iridescence process; iii) the presence of fluorescent molecules producing a violet-blue coloration when irradiated by ultraviolet light and finally iv) the particular ultrastructure of the scales presenting a three-dimensions natural photonic crystal. Due to the confinement of the fluorescent sources in a photonic crystal, the emission is preferentially directed in space and its efficiency is enhanced for particular detection angles. Furthermore, a clear correlation is observed between the reflection and the fluorescent processes that control the surface optical response. So, collecting and analyzing data over every emerging direction is shown to be crucial. To quantify these observations and characterize these optical effects, three types of measurements were carried out. First of all, the morphology of the butterfly was examined by means of scanning electron microscopes. In addition, the angular distribution of the reflected light was measured with a high performance viewing angle instrument, providing BRDF data (Bidirectional Reflectance Distribution Function). Finally, an automatic method coupling an ultraviolet source to a gonio-spectrophotometer allows fluorescent emission characterization. This set-up, developed on purpose, is composed of various excitation and analysis modules and provides angular emission maps. Tentative explanation for the measured correlation are presented.
langue originaleAnglais
titreProc. SPIE
Volume8094
Edition80940E
Les DOIs
étatPublié - 2011

Empreinte digitale

wings
iridescence
photonics
bidirectional reflectance
fluorescence
spectrophotometers
ultraviolet radiation
attraction
crystals
flash
emerging
angular distribution
electron microscopes
modules
distribution functions
color
scanning
excitation
molecules

Citer ceci

Van Hooijdonk, Eloise ; Barthou, Carlos ; Vigneron, Jean-Pol ; Berthier, Serge. / Structural fluorescence in the butterfly Morpho sulkowskyi (Nymphalidae). Proc. SPIE. Vol 8094 80940E. Ed. 2011.
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abstract = "Evolution and natural selection have generated complexity and efficiency in all living families. Morpho sulkowskyi - a butterfly from Neotropic ecozone (South America) and belonging to the Nymphalidae family - concentrates on its wings distinct but complementary features contributing to its exceptional visual attraction: i) the wings are predominantly white but ii) present a bright blue metallic flash due to an iridescence process; iii) the presence of fluorescent molecules producing a violet-blue coloration when irradiated by ultraviolet light and finally iv) the particular ultrastructure of the scales presenting a three-dimensions natural photonic crystal. Due to the confinement of the fluorescent sources in a photonic crystal, the emission is preferentially directed in space and its efficiency is enhanced for particular detection angles. Furthermore, a clear correlation is observed between the reflection and the fluorescent processes that control the surface optical response. So, collecting and analyzing data over every emerging direction is shown to be crucial. To quantify these observations and characterize these optical effects, three types of measurements were carried out. First of all, the morphology of the butterfly was examined by means of scanning electron microscopes. In addition, the angular distribution of the reflected light was measured with a high performance viewing angle instrument, providing BRDF data (Bidirectional Reflectance Distribution Function). Finally, an automatic method coupling an ultraviolet source to a gonio-spectrophotometer allows fluorescent emission characterization. This set-up, developed on purpose, is composed of various excitation and analysis modules and provides angular emission maps. Tentative explanation for the measured correlation are presented.",
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Structural fluorescence in the butterfly Morpho sulkowskyi (Nymphalidae). / Van Hooijdonk, Eloise; Barthou, Carlos; Vigneron, Jean-Pol; Berthier, Serge.

Proc. SPIE. Vol 8094 80940E. Ed. 2011.

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

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AU - Vigneron, Jean-Pol

AU - Berthier, Serge

PY - 2011

Y1 - 2011

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