Multilayer manipulated diffraction in flower beetles Torynorrhina flammea: intraspecific structural colouration variation
Multilayer manipulated diffraction in flower beetles Torynorrhina flammea: intraspecific structural colouration variation
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花甲虫 Torynorrina flammea 的多层操纵衍射：种内结构着色变化
DOI：
10.1088/2040-8978/16/10/105302
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发表时间：
2014-10
影响因子：
2.1
通讯作者：
Liu, X. H.
中科院分区：
文献类型：
--
作者：
Song, C. X.;Liu, F.;Hao, Y. H.;Hu, X. H.;Zhang, Y. F.;Liu, X. H.
We report that the intraspecific structural colouration variation of the beetle Torynorrhina flammea is a result of diffraction shifting manipulated by a multilayer sub-structure contained in a three-dimensional (3D) photonic architecture. With a perpendicularly 2D quasiperiodic diffraction grating inserted into the multilayer, the 3D photonic structure gives rise to anticrossing bandgaps of diffraction from the coupling of grating and multilayer bands. The angular dispersion of diffraction induced by the multilayer band shift behaves normally, in contrast to the ‘ultranegative’ behaviour controlled by the quasiperiodic grating. In addition, the diffraction wavelength is more sensitive to the multilayer periodicity than the diffraction grating constant, which explains the ‘smart’ biological selection of T. flammea in its intraspecific colouration variation from red to green to blue. The elucidated mechanism could be advantageous for the potential exploration of novel dispersive optical elements.
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