Research Papers

Detailed experimental analysis of the structural fluorescence in the butterfly Morpho sulkowskyi (Nymphalidae)

[+] Author Affiliations
Eloise Van Hooijdonk

University of Namur (FUNDP), Research Center for the Physics of Matter and Radiation (PMR), 61 rue de Bruxelles, Namur, 5000, Belgiumevanhooi@fundp.ac.be; jean-pol.vigneron@fundp.ac.be

Pierre and Marie Curie University – Paris 6 (UPMC), Institut des NanoSciences de Paris (INSP), CNRS-UMR 7588, 4 Place Jussieu, Paris, 75005, Francecarlos.barthou@insp.jussieu.fr; serge.berthier@insp.jussieu.fr

Carlos Barthou, Serge Berthier

Pierre and Marie Curie University – Paris 6 (UPMC), Institut des NanoSciences de Paris (INSP), CNRS-UMR 7588, 4 Place Jussieu, Paris, 75005, Francecarlos.barthou@insp.jussieu.fr; serge.berthier@insp.jussieu.fr

Jean Pol Vigneron

University of Namur (FUNDP), Research Center for the Physics of Matter and Radiation (PMR), 61 rue de Bruxelles, Namur, 5000, Belgiumevanhooi@fundp.ac.be; jean-pol.vigneron@fundp.ac.be

J. Nanophoton. 5(1), 053525 (November 14, 2011). doi:10.1117/1.3659147
History: Received August 11, 2011; Revised September 23, 2011; Accepted October 17, 2011; Published November 14, 2011; Online November 14, 2011
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The Morpho sulkowskyi concentrates on its dorsal wings complementary features contributing to its visual attraction: predominantly translucent, their wings display a blue coloration due to light interference. Fluorescent molecules, producing a violet-blue coloration when irradiated by ultraviolet light, are embedded in the scales which present a two-dimensional photonic structure. We investigate i. the effects of the fluorophores confinement in the structure on the variation of the emission intensity and coloration with the observation direction and ii. the correlation between the reflection and emission processes that control the surface optical response. Three types of measurements have been carried out. The morphology of the butterfly was examined with a scanning electron microscope. Then, the spatial distribution of the reflected light was measured with a viewing angle instrument, providing bidirectional reflectance distribution function data. Finally, an automatic method coupling an ultraviolet source to a gonio-spectrophotometer allowed for an extensive fluorescent emission characterization and provided angular emission maps. We find a spatial variation of the emission intensity and coloration and also an exhaustion behavior of the fluorophores. Moreover, we reveal that the spatial distribution of the emitted and reflected light is mainly governed by the photonic structure.

Figures in this Article
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Eloise Van Hooijdonk ; Carlos Barthou ; Jean Pol Vigneron and Serge Berthier
"Detailed experimental analysis of the structural fluorescence in the butterfly Morpho sulkowskyi (Nymphalidae)", J. Nanophoton. 5(1), 053525 (November 14, 2011). ; http://dx.doi.org/10.1117/1.3659147


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