Merging Top‐Down and Bottom‐Up Approaches to Fabricate Artificial Photonic Nanomaterials with a Deterministic Electric and Magnetic Response,Advanced Functional Materials

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Merging Top‐Down and Bottom‐Up Approaches to Fabricate Artificial Photonic Nanomaterials with a Deterministic Electric and Magnetic Response
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2019-11-12 , DOI: 10.1002/adfm.201905722
Kay Dietrich ₁ , Matthias Zilk ₁ , Martin Steglich ₁ , Thomas Siefke ₁ , Uwe Hübner ₂ , Thomas Pertsch _{1,

3} , Carsten Rockstuhl _{4,

5} , Andreas Tünnermann _{1,

3} , Ernst‐Bernhard Kley ₁

Affiliation

Artificial photonic nanomaterials made from densely packed scatterers are frequently realized either by top‐down or bottom‐up techniques. While top‐down techniques offer unprecedented control over achievable geometries for the scatterers, by trend they suffer from being limited to planar and periodic structures. In contrast, materials fabricated with bottom‐up techniques do not suffer from such disadvantages but, unfortunately, they offer only little control on achievable geometries for the scatterers. To overcome these limitations, a nanofabrication strategy is introduced that merges both approaches. A large number of scatterers are fabricated with a tailored optical response by fast character projection electron‐beam lithography and are embedded into a membrane. By peeling‐off this membrane from the substrate, scrambling, and densifying it, a bulk material comprising densely packed and randomly arranged scatterers is obtained. The fabrication of an isotropic material from these scatterers with a strong electric and magnetic response is demonstrated. The approach of this study unlocks novel opportunities to fabricate nanomaterials with a complex optical response in the bulk but also on top of arbitrarily shaped surfaces.

中文翻译：

融合自上而下和自下而上的方法来制造具有确定的电磁响应的人造光子纳米材料

由密堆积散射体制成的人造光子纳米材料通常通过自上而下或自下而上的技术来实现。自上而下的技术为散射体的可实现几何形状提供了空前的控制，但从趋势上讲，它们受限于平面和周期性结构的困扰。相比之下，采用自下而上技术制造的材料不会遭受这些缺点的影响，但是不幸的是，它们对散射体可实现的几何形状仅提供了很少的控制。为了克服这些限制，引入了将两种方法融合在一起的纳米制造策略。通过快速字符投影电子束光刻技术，可以制造出具有定制的光学响应的大量散射体，并将其嵌入膜中。通过从基材上剥离该膜，加扰并使其致密化，获得了包括密集堆积和随机排列的散射体的散装材料。演示了利用这些散射体制造的各向同性材料，具有强的电磁响应。这项研究的方法为制造具有复杂光学响应的纳米材料提供了新的机会，该纳米材料既可以在主体中，也可以在任意形状的表面之上。

更新日期：2020-01-17

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