Mechanically tunable terahertz metamaterials
Mechanically tunable terahertz metamaterials
复制标题
机械可调谐太赫兹超材料
DOI：
10.1063/1.4773238
复制
发表时间：
2013-03-25
影响因子：
4
通讯作者：
Abbott, Derek
中科院分区：
文献类型：
--
作者：
Li, Jining;Shah, Charan M.;Abbott, Derek
电磁器件设计和柔性电子制造相结合，以证明机械可调超材料工作在太赫兹频率。每个超材料包括在高弹性聚二甲基硅氧烷衬底上的谐振器的平面阵列。超材料的共振是通过衬底变形来控制的。向基板施加拉伸力改变了单元间电容，从而改变了谐振器的谐振频率。在实验中，大于8%的调谐范围内实现了良好的重复性，在几个拉伸松弛循环。这项研究有望在远程应变传感和其他可控的超材料为基础的设备的应用。
Electromagnetic device design and flexible electronics fabrication are combined to demonstrate mechanically tunable metamaterials operating at terahertz frequencies. Each metamaterial comprises a planar array of resonators on a highly elastic polydimethylsiloxane substrate. The resonance of the metamaterials is controllable through substrate deformation. Applying a stretching force to the substrate changes the inter-cell capacitance and hence the resonance frequency of the resonators. In the experiment, greater than 8% of the tuning range is achieved with good repeatability over several stretching-relaxing cycles. This study promises applications in remote strain sensing and other controllable metamaterial-based devices.