The Royal Society

Supplementary material from "Controlled fluorescence in a beetle's photonic structure and its sensitivity to environmentally induced changes"

Version 2 2016-12-19, 13:24
Version 1 2016-12-12, 11:33
Posted on 2016-12-12 - 11:33
The scales covering the elytra of the male Hoplia coerulea beetle contain fluorophores embedded within a porous photonic structure. The photonic structure controls both insect colour (reflected light) and fluorescence emission. Herein, the effects of water-induced changes on the fluorescence emission from the beetle were investigated. The fluorescence emission peak wavelength was observed to blue-shift on water immersion of the elytra whereas its reflectance peak wavelength was observed to red-shift. Time-resolved fluorescence measurements, together with optical simulations, confirmed that the radiative emission is controlled by a naturally engineered photonic bandgap while the elytra are in the dry state, whereas non-radiative relaxation pathways dominate the emission response of wet elytra.


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Proceedings of the Royal Society B: Biological Sciences


Sébastien R. Mouchet
Michaël Lobet
Branko Kolaric
Anna M. Kaczmarek
Rik Van Deun
Peter Vukusic
Olivier Deparis
Eloise Van Hooijdonk
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