Zárate Yair, Babaee Sahab, Kang Sung H, Neshev Dragomir N, Shadrivov Ilya V, Bertoldi Katia, Powell David A
Nonlinear Physics Centre and Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601 Australia.
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
Sci Rep. 2016 Jun 20;6:28273. doi: 10.1038/srep28273.
Electromagnetic resonators are integrated with advanced elastic material to develop a new type of tunable metamaterial. An electromagnetic-elastic metamaterial able to switch on and off its electromagnetic chiral response is experimentally demonstrated. Such tunability is attained by harnessing the unique buckling properties of auxetic elastic materials (buckliballs) with embedded electromagnetic resonators. In these structures, simple uniaxial compression results in a complex but controlled pattern of deformation, resulting in a shift of its electromagnetic resonance, and in the structure transforming to a chiral state. The concept can be extended to the tuning of three-dimensional materials constructed from the meta-molecules, since all the components twist and deform into the same chiral configuration when compressed.
电磁谐振器与先进弹性材料集成，以开发一种新型的可调谐超材料。实验证明了一种能够开启和关闭其电磁手性响应的电磁弹性超材料。这种可调谐性是通过利用具有嵌入式电磁谐振器的负泊松比弹性材料（屈曲球）的独特屈曲特性来实现的。在这些结构中，简单的单轴压缩会导致复杂但可控的变形模式，从而导致其电磁共振发生偏移，并使结构转变为手性状态。该概念可以扩展到由超分子构建的三维材料的调谐，因为所有组件在压缩时都会扭曲并变形为相同的手性构型。
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