Structural Diversity with Varying Disorder Enables the Multicolored Display in the Longhorn Beetle Sulawesiella rafaelae
Structural Diversity with Varying Disorder Enables the Multicolored Display in the Longhorn Beetle Sulawesiella rafaelae
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DOI：
10.1016/j.isci.2020.101339
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发表时间：
2020-07-24
期刊：
影响因子：
5.8
通讯作者：
Wilts, Bodo D.
中科院分区：
文献类型：
--
作者：
Bermudez-Urena, Esteban;Kilchoer, Cedric;Wilts, Bodo D.
通过分层光子纳米结构进行光控制，可以使许多甲虫、鸟类和蝴蝶呈现出引人注目的彩色显示。为了实现不同的反射颜色，自然生物主要依靠折射率变化或固定结构设计的缩放，而不是改变结构类型。在这里，我们描述了长角甲虫 Sulawesiella rafaelae 中存在的独特着色机制，它呈现出绿松石色、黄绿色和橙色，每种颜色都有不同的虹彩。通过光学和电子显微镜，我们发现颜色源自具有不同程度结构紊乱的毛发状鳞片的多层结构。结构表征和光学模型表明，无序强烈影响鳞片的光学特性，从而允许独立调整光学响应。我们的研究结果揭示了多层光子结构中无序的相互作用及其生物学意义，并可能激发新的生态研究和新型光学元件的开发。
Light control through layered photonic nanostructures enables the strikingly colored displays of many beetles, birds, and butterflies. To achieve different reflected colors, natural organisms mainly rely on refractive index variations or scaling of a fixed structure design, as opposed to varying the type of structure. Here, we describe the presence of distinct coloration mechanisms in the longhorn beetle Sulawesiella rafaelae, which exhibits turquoise, yellow-green, and orange colors, each with a variable iridescence. By optical and electron microscopy, we show that the colors originate from multilayered architectures in hair-like scales with varying amounts of structural disorder. Structural characterizations and optical modeling show that the disorder strongly influences the optical properties of the scales, allowing an independent adjustment of the optical response. Our results shed light on the interplay of disorder in multilayered photonic structures and their biological significance, and could potentially inspire new ecological research and the development of novel optical components.