Printable all-dielectric water-based absorber.

Printable all-dielectric water-based absorber.
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DOI:
10.1038/s41598-018-32395-1
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发表时间:
2018-09-27
期刊:
影响因子:
4.6
通讯作者:
Hao Y
Hao Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bradley PJ;Torrico MOM;Brennan C;Hao Y

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完全由全电介质结构产生的等幅重叠电偶极子和磁偶极子之间的相位相互作用在电磁能量的操纵中提出了一个有趣的范例。在这里,我们通过提出增材制造路线和相关的设计原则来提供整体实施,这些原则可以实现合成多材料微结构的编程和制造。反过来,我们组成,制造和实验验证了第一个可证明的3d打印全介质电磁宽带吸收器,指出了规避传统金属-介质吸收器配置的技术限制的方法。关键的创新之一是合理地将具有高介电常数的分散软物质(如水)分布在低介电矩阵中,以增强在减小的长度尺度上的波吸收。在某种程度上,这些结果扩展了增材制造的前景,并说明了拓扑优化的力量,以创建精心制作的磁和电响应,这些响应肯定会在整个电磁频谱中找到新的应用。
The phase interplay between overlapping electric and magnetic dipoles of equal amplitude generated by exclusively alldielectric structures presents an intriguing paradigm in the manipulation of electromagnetic energy. Here, we offer a holistic implementation by proposing an additive manufacturing route and associated design principles that enable the programming and fabrication of synthetic multi-material microstructures. In turn, we compose, manufacture and experimentally validate the first demonstrable 3d printed all-dielectric electromagnetic broadband absorbers that point the way to circumventing the technical limitations of conventional metal-dielectric absorber configurations. One of the key innovations is to judicially distribute a dispersive soft matter with a high-dielectric constant, such as water, in a low-dielectric matrix to enhance wave absorption at a reduced length scale. In part, these results extend the promise of additive manufacturing and illustrate the power of topology optimisation to create carefully crafted magnetic and electric responses that are sure to find new applications across the electromagnetic spectrum.
具有对称相干照明的超薄宽带近乎完美的吸收体
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