Bifunctional metamaterials with simultaneous and independent manipulation of thermal and electric fields.
Bifunctional metamaterials with simultaneous and independent manipulation of thermal and electric fields.
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DOI：
10.1364/oe.24.023072
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发表时间：
2015-05
期刊：
影响因子：
3.8
通讯作者：
Chuwen Lan;K. Bi;Xiaojian Fu;Bo Li;Ji Zhou
中科院分区：
文献类型：
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作者：
Chuwen Lan;K. Bi;Xiaojian Fu;Bo Li;Ji Zhou
超材料提供了一种强大的方式来操纵各种物理场，从波场（电磁场、声场、弹性波等）、静态场（静磁场、静电场）到扩散场（热场、扩散质量）。然而，相关的报告和研究通常局限于单一的物理领域或功能。在这项研究中，我们提出并实验证明了一种双功能的超材料，可以同时和独立地操纵热和电场。具体而言，介绍了一种导热、导电性可独立控制的复合材料，并在此基础上设计、制作了一种同时屏蔽热流和集中电流的双功能器件，并对其进行了表征。这项工作为超材料超越其自然限制提供了一个令人鼓舞的例子，为构建多物理场操纵的广阔平台提供了一个充满希望的未来。
Metamaterials offer a powerful way to manipulate a variety of physical fields ranging from wave fields (electromagnetic field, acoustic field, elastic wave, etc.), static fields (static magnetic field, static electric field) to diffusive fields (thermal field, diffusive mass). However, the relevant reports and studies are usually limited to a single physical field or functionality. In this study, we proposed and experimentally demonstrated a bifunctional metamaterial which could manipulate thermal and electric fields simultaneously and independently. Specifically, a composite with independently controllable thermal and electric conductivity was introduced, on the basis of which a bifunctional device capable of shielding thermal flux and concentrating electric current simultaneously was designed, fabricated and characterized. This work provides an encouraging example of metamaterials transcending their natural limitations, which offers a promising future in building a broad platform for the manipulation of multi-physics fields.