Bio-inspired band-gap tunable elastic optical multilayer fibers.
Bio-inspired band-gap tunable elastic optical multilayer fibers.
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DOI：
10.1002/adma.201203529
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发表时间：
2013-04-18
影响因子：
29.4
通讯作者：
Vukusic, Peter
中科院分区：
文献类型：
--
作者：
Kolle, Mathias;Lethbridge, Alfred;Kreysing, Moritz;Baumberg, Jeremy J.;Aizenberg, Joanna;Vukusic, Peter
了解生物光子系统的形态、组成和光学外观之间的相互作用可以为新型人工光子元件提供广泛的灵感。[1-3]有时，对自然光子学的研究会为光学技术提供特定的设计模板。[4-9]为此，我们提出了在珍珠果实的种皮中发现的分层光子结构的调查结果，这直接启发了我们创造新颖的光子纤维。果实的颜色是由种子外部组织层中单个细胞内的同心层状结构中的光的干涉引起的。自然结构呈现出两种相互依赖的、技术上可利用的光和颜色操纵特征：纳米尺度上的规则性与微米尺度的圆柱对称性叠加，导致光在宽范围方向上的波长选择性散射。这是新型软生物启发光子光纤的基础，该光纤具有光谱过滤能力和平面布拉格堆叠的色彩亮度，该平面布拉格堆叠与由微尺度曲率引入的大角散射范围复合，这也减少了通常与平坦多层反射器相关联的强方向性色度变化。透明和弹性的合成材料使多层干涉光纤具有高反射率，该反射率可通过纵向机械应变动态调谐。弹性纤维的两倍伸长导致反射峰中心波长偏移超过200 nm。这种形式的柔性光子纤维的生物灵感设计和制造预示着向新型纤维基柔性光子材料和纺织品的过渡，这些材料和纺织品的颜色在整个可见光谱和光学应变传感器上都是可调的。自然界最鲜艳的颜色，最高的折射率，最强的白色和最深的黑色依赖于有序的，准有序或无序结构，其晶格常数或散射元素尺寸在可见光辐射波长的量级。[10-16]通过诱导干涉或衍射，具有广泛结构多样性的生物光子结构强烈改变反射和透射光的光谱组成，导致许多生物体的惊人结构色。[17一维多层排列在自然界中结构色的产生中起着重要作用，并且主要在动物界，特别是昆虫界中进行了研究。[10 19，20]平面分层光子系统最近也越来越频繁地在各种工厂中被报道。[21-24]在中南美洲的热带雨林中，一种名为Margaritaria nobilis的植物的果实具有醒目的蓝绿色（图1a）。这种植物部分依赖于鸟类传播种子，这些鸟类可能会被五颜六色的展示所吸引。[25果实蓝色种皮中的细胞被拉长，大多呈现蓝色或绿色（图1a，B）。几层电池堆叠在彼此的顶部上，各个电池层的平面取向不同（图1c）。单电池横截面显示，整个内部体积被周期性同心分层形态占据，总体周期为（180±30）nm（图1 d，e）。入射到水果表面的光在每个细胞中的周期性结构内发生干涉，导致蓝光的反射。
Knowledge of the interplay between the morphology, composition and optical appearance of biological photonic systems can provide broad inspiration for novel artificial photonic elements.[1–3] On occasion, the study of natural photonics yields specific design templates for optical technologies.[4–9] To this end, we present the results of the investigation of the hierarchical photonic structure discovered in the seed coat of Margaritaria nobilis fruits, which directly inspired our creation of novel photonic fibers. The fruit’s hue results from the interference of light within a concentrically-layered architecture found inside individual cells in the seed’s outer tissue layers. The natural structure presents two codependent, technologically exploitable features for light and color manipulation: regularity on the nanoscale that is superposed with microscale cylindrical symmetry, resulting in wavelength selective scattering of light in a wide range of directions. This is the foundation for novel soft bioinspired photonic fibers with the spectral filtering capabilities and color brilliance of a planar Bragg stack compounded with a large angular scattering range introduced by the microscale curvature, which also decreases the strong directional chromaticity variation usually associated with flat multilayer reflectors. Transparent and elastic synthetic materials equip the multilayer interference fibers with high reflectance that is dynamically tuned by longitudinal mechanical strain. A two-fold elongation of the elastic fibers results in a shift of reflection peak center wavelength of over 200 nm. The bio-inspired design and manufacture of this form of soft photonic fiber heralds the transition to novel fiber-based flexible photonic materials and textiles with colors that are tunable over the entire visible spectrum and optical strain sensors.Nature’s most vivid colors, highest transparencies, strongest whites and deepest blacks rely on ordered, quasi-ordered or disordered structures with lattice constants or scattering element sizes on the order of the wavelength of visible radiation.[10–16] By inducing interference or diffraction, biological photonic structures of a wide structural diversity strongly alter the spectral composition of reflected and transmitted light resulting in the stunning structural colors of many organisms.[17, 18] Onedimensional multilayer arrangements play an important role in the creation of structural colors in nature and have primarily been studied in the animal kingdom, especially the insect world.[10, 19, 20] Planar layered photonic system have recently also been increasingly frequently reported in various plants.[21–24] The fruits of the plant Margaritaria nobilis in the rain forests of Middle and South America have a striking blue-green hue (Figure 1a). The plant partly relies on seed dispersal by birds which might be attracted by the colorful display.[25, 26] The cells in the fruit’s blue seed coat are elongated and mostly appear blue or green (Figure 1 a, b). Several layers of cells are stacked on top of each other with varying planar orientation of the individual cell layers (Figure 1 c). A single cell cross-section reveals that the entire interior volume is occupied by a periodic concentricallylayered morphology with an overall periodicity of (180±30) nm (Figure 1 d, e). Light incident on the fruit’s surface undergoes interference within the periodic structure in each cell resulting in the reflection of blue light.
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影响因子：
1.9
作者：
Hallam, Benny T.;Hiorns, Anthony G.;Vukusic, Peter
通讯作者：
Vukusic, Peter
影响因子：
4
作者：
Huang, Fu Min;Sinha, Jatin K.;Baumberg, Jeremy J.
通讯作者：
Baumberg, Jeremy J.
影响因子：
56.9
作者：
Aizenberg, J;Weaver, JC;Fratzl, P
通讯作者：
Fratzl, P
影响因子：
29.4
作者：
Gibbons, Nicholas;Baumberg, Jeremy J.;Steiner, Ullrich
通讯作者：
Steiner, Ullrich
影响因子：
3.8
作者：
Kolle, Mathias;Zheng, Bo;Steiner, Ullrich
通讯作者：
Steiner, Ullrich