dc Electric Invisibility Cloak
dc Electric Invisibility Cloak
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DOI：
10.1103/physrevlett.109.053902
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发表时间：
2012-08-02
影响因子：
8.6
通讯作者：
Cui, Tie Jun
中科院分区：
文献类型：
--
作者：
Yang, Fan;Mei, Zhong Lei;Cui, Tie Jun
我们提出了第一个实验演示的直流电斗篷的稳定电流场。利用导电材料和电阻网络之间的类比，直流隐身斗篷的设计，制造和测试使用电路理论。我们表明，直流斗篷可以引导电流周围的斗篷地区顺利和保持扰动只在斗篷。在斗篷外面，电流线恢复到原来的方向，好像什么都没有发生。测量数据与理论预测和仿真结果吻合良好，具有接近理想的隐身性能。该方法可直接应用于变换光学设计的其它各向异性直流电器件。通过控制各向异性电导率来操纵稳态电流具有很多潜在的应用，例如电阻抗断层成像、石墨烯、自然资源勘探和军事伪装。
We present the first experimental demonstration of a dc electric cloak for steady current fields. Using the analogy between electrically conducting materials and resistor networks, a dc invisibility cloak is designed, fabricated, and tested using the circuit theory. We show that the dc cloak can guide electric currents around the cloaked region smoothly and keep perturbations only inside the cloak. Outside the cloak, the current lines return to their original directions as if nothing happens. The measurement data agree exceptionally well with the theoretical prediction and simulation result, with nearly perfect cloaking performance. The proposed method can be directly used to realize other dc electric devices with anisotropic conductivities designed by the transformation optics. Manipulation of steady currents with the control of anisotropic conductivities has a lot of potential applications, such as electric impedance tomography, graphene, natural resource exploration, and military camouflage.