甲虫光子结构中的可控荧光及其对环境诱导变化的敏感性。
Controlled fluorescence in a beetle's photonic structure and its sensitivity to environmentally induced changes.
作者信息
Mouchet Sébastien R, Lobet Michaël, Kolaric Branko, Kaczmarek Anna M, Van Deun Rik, Vukusic Peter, Deparis Olivier, Van Hooijdonk Eloise
机构信息
Department of Physics, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK.
出版信息
Proc Biol Sci. 2016 Dec 28;283(1845). doi: 10.1098/rspb.2016.2334.
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.
覆盖雄性蓝 Hoplia coerulea 甲虫鞘翅的鳞片含有嵌入多孔光子结构中的荧光团。该光子结构控制昆虫的颜色（反射光）和荧光发射。在此，研究了水诱导变化对甲虫荧光发射的影响。观察到鞘翅浸入水中时荧光发射峰波长发生蓝移，而其反射峰波长发生红移。时间分辨荧光测量以及光学模拟证实，在鞘翅处于干燥状态时，辐射发射由天然设计的光子带隙控制，而在潮湿鞘翅的发射响应中，非辐射弛豫途径占主导。
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