Conductively coupled terahertz metamaterials with dual functions of electromagnetically induced transparent and Fano effects for sensing applications

IF 2.6 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physica Scripta Pub Date : 2024-09-11 DOI:10.1088/1402-4896/ad7338

Yuxuan Chen, Yongzheng Sun, Weijun Zhou, Xuefeng Qin, Qian Zhao, Yueke Wang and Ben-Xin Wang

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Abstract

A terahertz metamaterial structure consisting of two U-shaped split-ring resonators and a horizontal cut-line resonator is designed for realizing the electromagnetically induced transparency (EIT) effect and the Fano resonance effect. The genesis of the EIT and Fano resonance bifunctionality is illustrated by combining the near-field distribution analysis of transparent windows and transmission dips. Interestingly, the bifunctional dual-band transparency effect could transform into a single-functional single-band transparency effect when we change the position of the square metal sheet in the vertical direction of the composited terahertz metamaterial structure. In addition, based on the high-quality factor of Fano resonance response, the proposed bifunctional terahertz metamaterial device has good refractive index sensing sensitivity. These results indicate that our proposed terahertz metamaterial can provide guidance for the design of subsequent multifunctional and integrated metamaterials and optoelectronic devices.

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具有电磁诱导透明效应和法诺效应双重功能的传导耦合太赫兹超材料，可用于传感应用

为实现电磁诱导透明（EIT）效应和法诺共振效应，设计了一种由两个 U 形分裂环谐振器和一个水平切割线谐振器组成的太赫兹超材料结构。通过结合透明窗口和透射凹陷的近场分布分析，说明了电磁诱导透明效应和法诺共振双功能的成因。有趣的是，当我们改变方形金属片在复合太赫兹超材料结构垂直方向上的位置时，双功能双波段透明效应可转化为单功能单波段透明效应。此外，基于法诺共振响应的高质量因子，所提出的双功能太赫兹超材料器件具有良好的折射率传感灵敏度。这些结果表明，我们提出的太赫兹超材料可为后续多功能集成超材料和光电器件的设计提供指导。

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来源期刊

Physica Scripta 物理-物理：综合

CiteScore

3.70

自引率

3.40%

发文量

782

审稿时长

4.5 months

期刊介绍： Physica Scripta is an international journal for original research in any branch of experimental and theoretical physics. Articles will be considered in any of the following topics, and interdisciplinary topics involving physics are also welcomed: -Atomic, molecular and optical physics- Plasma physics- Condensed matter physics- Mathematical physics- Astrophysics- High energy physics- Nuclear physics- Nonlinear physics. The journal aims to increase the visibility and accessibility of research to the wider physical sciences community. Articles on topics of broad interest are encouraged and submissions in more specialist fields should endeavour to include reference to the wider context of their research in the introduction.