Reconfigurable Metasurface Cloak for Dynamical Electromagnetic Illusions,ACS Photonics

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Reconfigurable Metasurface Cloak for Dynamical Electromagnetic Illusions
ACS Photonics ( IF 6.5 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acsphotonics.7b01114
Cheng Huang ₁ , Jianing Yang _{1,

2} , Xiaoyu Wu ₁ , Jiakun Song ₁ , Mingbo Pu ₁ , Changtao Wang ₁ , Xiangang Luo ₁

Affiliation

Considerable attentions have been focused on the realization of carpet cloaks in the past decade. Most of the current carpet cloaks can perform only one electromagnetic (EM) shape for concealing inside objects, and dynamical control of arbitrary EM virtual shapes remains a significant challenge. Here, a desirable method is proposed to construct a reconfigurable carpet cloak using tunable metasurface technology. By controlling the active elements loaded on the metasurface, the surface phase distribution can be dynamically changed to make the cloak generate the predesigned scattering field. This reconfigurable metasurface cloak is experimentally realized at the microwave frequency, which demonstrates that it can not only reduce unwanted scattering for imitating the reflection of a flat metallic plane, but also mimic other different EM virtual shapes by reconfiguring the phase distribution. To the best of our knowledge, this is the first carpet cloak that achieves dynamical illusions by switching the EM shapes without changing its physical shape. The proposed technology could be also extended to the terahertz and even optical domain.

中文翻译：

动态电磁幻觉的可重新配置的元表面披风

在过去的十年中，相当多的注意力集中在实现地毯披风上。当前大多数地毯披风只能执行一种电磁（EM）形状以隐藏内部物体，而动态控制任意EM虚拟形状仍然是一项重大挑战。在此，提出了一种使用可调超颖表面技术构造可重构地毯披风的理想方法。通过控制加载在超表面上的活性元素，可以动态改变表面相的分布，以使斗篷产生预先设计的散射场。这种可重配置的超表面披风是在微波频率下通过实验实现的，这表明它不仅可以减少模仿平面金属平面反射所产生的不必要的散射，而且还可以通过重新配置相位分布来模仿其他不同的EM虚拟形状。据我们所知，这是第一个通过改变EM形状而不改变其物理形状来实现动态幻觉的地毯。所提出的技术还可以扩展到太赫兹甚至光学领域。

更新日期：2017-11-16

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