Experimental demonstration of ultra-large-scale terahertz all-dielectric metamaterials
Experimental demonstration of ultra-large-scale terahertz all-dielectric metamaterials
复制标题
超大规模太赫兹全电介质超材料实验演示
DOI：
10.1364/prj.7.000457
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发表时间：
2019-04-01
影响因子：
7.6
通讯作者：
Yang, Yuping
中科院分区：
文献类型：
--
作者：
Bi, Ke;Yang, Daquan;Yang, Yuping
全介质超材料是一种低损耗、高效率的太赫兹器件平台。然而，现有的制造方法难以实现精度和成本之间的良好平衡。本文受纳米模板辅助自组装方法的启发，发展了一种微模板辅助自组装（MTAS）方法，用于制备大尺寸、高精度、柔性的陶瓷微球全介质超材料，其面积超过900 cm×900 cm。无需有机溶剂、真空和复杂设备，MTAS方法确保了低成本和环保的制造。陶瓷微球谐振器可以容易地组装成几乎任意的排列和复杂的聚集体，例如二聚体、三聚体、四聚体和链。最后，使用热收缩基板和偶极耦合效应，带宽为0.15太赫兹，反射率高达95%的宽带反射器被证明。该工作为太赫兹全介质超材料的研究提供了一个多功能的平台，有望应用于各种高效的太赫兹器件。
All-dielectric metamaterials have emerged as a promising platform for low-loss and highly efficient terahertz devices. However, existing fabrication methods have difficulty in achieving a good balance between precision and cost. Here, inspired by the nano-template-assisted self-assembly method, we develop a micro-template-assisted self-assembly (MTAS) method to prepare large-scale, high-precision, and flexible ceramic microsphere all-dielectric metamaterials with an area exceeding 900 cm×900 cm. Free from organic solvents, vacuum, and complex equipment, the MTAS method ensures low-cost and environmentally friendly fabrication. The ceramic microsphere resonators can be readily assembled into nearly arbitrary arrangements and complex aggregates, such as dimers, trimers, quadrumers, and chains. Finally, using the heat-shrinkable substrate and dipole coupling effect, a broadband reflector with a bandwidth of 0.15 THz and a reflection of up to 95% is demonstrated. This work provides a versatile and powerful platform for terahertz all-dielectric metamaterials, with potential to be applied in a wide variety of high-efficiency terahertz devices.