3D Helix Engineering in Chiral Photonic Materials
3D Helix Engineering in Chiral Photonic Materials
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DOI：
10.1002/adma.201903120
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发表时间：
2019-08-01
影响因子：
29.4
通讯作者：
Schenning, Albertus P. H. J.
中科院分区：
文献类型：
--
作者：
Kragt, Augustinusj J.;Hoekstra, Davey C.;Schenning, Albertus P. H. J.
在三维空间中设计手性光子材料的螺旋结构仍然是一个挑战。在光聚合手性液晶中通过局部分层法制备了三维螺旋结构光子材料。所制备的手性光子材料能够反射圆偏振光的两个旋向性，表现出超反射特性。模拟结果与实验观察到的光子特性相匹配，并揭示了扭曲的螺旋结构。可以制备3D工程聚合物膜，其反射依赖于左旋和右旋圆偏振光和线性偏振光，并且在改变入射光的偏振时表现出变化的颜色对比度。因此，这些3D工程光子材料对于从防伪标签和数据加密到美学和超反射膜的新兴应用都很有意义。
Engineering the helical structure of chiral photonic materials in three dimensions remains a challenge. 3D helix engineered photonic materials are fabricated by local stratification in a photopolymerizable chiral nematic liquid crystal. The obtained chiral photonic materials reflect both handedness of circular polarized light and show super-reflectivity. Simulations match the experimentally observed photonic properties and reveal a distorted helical structure. 3D engineered polymer films can be made that reflect both left- and right handed circular and linear polarized light dependent and exhibit a changing color contrast upon altering the polarization of incident light. Hence, these 3D engineered photonic materials are of interest for new and emerging applications ranging from anti-counterfeit labels and data encryption to aesthetics and super-reflective films.