AI 中文总结
该研究提出一种逆方法，通过比对光谱数据库识别生物光子网络的结构特征，发现环和孔是关键散射基元，为生物启发结构色材料提供新设计原则。
AI 中文摘要
结构色源于光与纳米级结构的相互作用，在自然界中广泛存在。随着结构复杂性增加，对其着色机制的理解逐渐减少。具有空间周期性折射率的周期性光子晶体的光学响应可用布洛赫理论很好地描述，而由随机组装的均匀球体组成的光子玻璃的光学响应则更为微妙但已得到充分研究。相比之下，许多甲虫体内发现的无序光子网络是最复杂的天然光子架构之一，其结构与颜色之间的基本关系仍不清楚。在此，我们使用一种逆方法来识别反射光谱中编码的结构特征。通过将未知系统的光谱与计算机生成的光子网络的模拟光谱数据库进行比较，我们推断其结构特性。将该方法应用于模拟网络和象鼻虫Pachyrhynchus congestus mirabilis蓝色着色的生物光子网络，我们确定环和孔是关键的局部散射基元。它们的特征尺寸决定了反射峰的光谱位置，而短程无序控制其宽度。该逆方法揭示了短程有序的明显光谱特征，而超均匀性和原始相似性的影响相对较弱。这表明蓝色结构着色由局部散射机制而非光子带隙效应控制。我们提出与逆光子玻璃的类比，其中孔和环作为相关的局部谐振器。这一视角为受生物启发的结构色材料提供了新的设计原则。
英文摘要
Structural color arises from the interaction of light with nanoscale structures and is widespread in nature. As structural complexity increases, the mechanisms governing coloration become progressively less understood. The optical response of periodic photonic crystals with a spatially periodic refractive index is well described by Bloch theory, whereas that of photonic glasses composed of randomly assembled uniform spheres is more subtle yet well studied. In contrast, disordered photonic networks found in many beetles are among the most complex natural photonic architectures, and the fundamental relationships between their structure and color remain unclear. Here, we use an inverse method to identify the structural features encoded in the reflectance spectrum. By comparing the spectrum of an unknown system with a database of simulated spectra from computer-generated photonic networks, we infer its structural properties. Applying this approach to both simulated networks and the biophotonic network responsible for the blue coloration of the weevil Pachyrhynchus congestus mirabilis, we identify rings and pores as the key local scattering motifs. Their characteristic sizes govern the spectral position of the reflectance peak, whereas short-range disorder controls its width. The inverse method reveals clear spectral signatures of short-range order, whereas the influence of hyperuniformity and primitive similarity appears comparatively weak. This suggests that blue structural coloration is governed by local scattering mechanisms rather than photonic band-gap effects. We propose an analogy to an inverse photonic glass, in which pores and rings act as correlated local resonators. This perspective provides new design principles for bio-inspired structural-color materials.
