School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, SA, Australia.
Opt Lett. 2013 Jun 15;38(12):2104-6. doi: 10.1364/OL.38.002104.
Utilizing an elastic polymer, we design and experimentally demonstrate a four-fold symmetric flexible metamaterial operating at terahertz frequencies. The fabricated metamaterials exhibit good stretchability and recoverability. Two independent resonances can be observed when the structure is probed with linearly polarized terahertz waves in two orthogonal axes. Applying a stretching force along a main axis causes an observable frequency shift in the corresponding resonance, with minimal effect on the other. This study suggests a possible application of flexible metamaterials for dual-axis strain sensing.
我们利用一种弹性聚合物，设计并实验演示了一种工作在太赫兹频率的四对称柔性超材料。所制备的超材料具有良好的拉伸性和可恢复性。当用两个正交轴的线性极化太赫兹波探测结构时，可以观察到两个独立的共振。沿主轴施加拉伸力会导致相应共振的频率发生可观测的移动，而对其他共振的影响最小。这项研究为双轴应变传感应用提供了一种柔性超材料的可能性。
