基于非对称H形结构的太赫兹波双频完美超材料吸收器

Dual-Band Perfect Metamaterial Absorber Based on an Asymmetric H-Shaped Structure for Terahertz Waves.

作者信息

Lu Taiguo, Zhang Dawei, Qiu Peizhen, Lian Jiqing, Jing Ming, Yu Binbin, Wen Jing, Zhuang Songlin

机构信息

Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China.

School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252059, China.

出版信息

Materials (Basel). 2018 Nov 6;11(11):2193. doi: 10.3390/ma11112193.

DOI:10.3390/ma11112193

PMID:30404174

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6266884/

Abstract

We designed an ultra-thin dual-band metamaterial absorber by adjusting the side strips' length of an H-shaped unit cell in the opposite direction to break the structural symmetry. The dual absorption peaks approximately 99.95% and 99.91% near the central resonance frequency of 4.72 THz and 5.0 THz were obtained, respectively. Meanwhile, a plasmon-induced transmission (PIT) like reflection window appears between the two absorption frequencies. In addition to theoretical explanations qualitatively, a multi-reflection interference theory is also investigated to prove the simulation results quantitatively. This work provides a way to obtain perfect dual-band absorption through an asymmetric metamaterial structure, and it may achieve potential applications in a variety of fields including filters, sensors, and some other functional metamaterial devices.

摘要

我们通过沿相反方向调整H形单元胞的侧边条长度来打破结构对称性，设计了一种超薄双频超材料吸收体。分别在中心共振频率4.72太赫兹和5.0太赫兹附近获得了约99.95%和99.91%的双吸收峰。同时，在两个吸收频率之间出现了类似表面等离子体激元诱导透射（PIT）的反射窗口。除了定性的理论解释外，还研究了多反射干涉理论以定量证明模拟结果。这项工作提供了一种通过不对称超材料结构获得完美双频吸收的方法，并且它可能在包括滤波器、传感器和其他一些功能性超材料器件在内的各种领域实现潜在应用。