Golden moth-inspired structures with a synergistic effect of interference, absorption and scattering,Soft Matter

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Golden moth-inspired structures with a synergistic effect of interference, absorption and scattering
Soft Matter ( IF 2.9 ) Pub Date : 2018-06-04 00:00:00 , DOI: 10.1039/c8sm00683k
Svetlana Savić-Šević _{1,

2,

3,

4,

5} , Dejan Pantelić _{1,

2,

3,

4,

5} , Branislav Jelenković _{1,

2,

3,

4,

5} , Branislav Salatić _{1,

2,

3,

4,

5} , Dejan V. Stojanović _{5,

6,

7,

8,

9}

Affiliation

We describe a new type of photonic material inspired by a Diachrysia chrysitis moth, whose nano-structured wings exhibit a prominent golden color. This is a layered photonic structure with a large refractive index contrast, whose alternating layers are rough at the nanoscale level. Theoretical analysis shows that the scattering and interference interact to enhance the local field within the layers and increase the absorption of the material, particularly in the UV–blue part of the spectrum. Theory is experimentally verified using holographically manufactured Bragg gratings in the dichromated-pullulan (DCP). Alternating air-pullulan layers are produced and held in place by sparsely separated nano-pillars. Air voids are filled with 20–100 nm diameter spherical nanoparticles which act as scatterers. Such materials, with a high refractive index contrast and nano-scale scatterers, are important for achieving large reflectance and a broad spectrum, with scattering as an additional mechanism for spectral control.

中文翻译：

灵感源自金蛾的结构，具有干扰，吸收和散射的协同作用

我们描述了一种由Diachrysia chrysitis启发的新型光子材料蛾，其纳米结构的翅膀表现出突出的金色。这是具有较大折射率对比度的分层光子结构，其交替层在纳米级水平上比较粗糙。理论分析表明，散射和干扰相互作用以增强层内部的局部场并增加材料的吸收，特别是在光谱的UV-蓝色部分。使用全息制造的重铬酸铝（DCP）中的布拉格光栅对理论进行了实验验证。稀疏分离的纳米柱产生并保持交替的空气普鲁兰层。空隙中充满了直径为20–100 nm的球形纳米颗粒，这些纳米颗粒充当散射体。具有高折射率对比和纳米级散射体的此类材料，

更新日期：2018-06-04

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