Inspired by the development of terahertz (THz) technology, the demand for THz sensors with high quality and high sensitivity is significantly increasing. In this study, one-dimensional metallic metamaterials based on cavity mode resonance are proposed for sensing applications in the THz regime. Owing to the strong energy concentration in the cavity, metamaterials with a high quality factor were obtained. Thus, the presented device not only achieved narrowband selective absorption but also exhibited excellent refractive index sensing with high sensitivity, figure of merit, and quality factor. The physical mechanism was verified by comparing the simulation results with that of the coupled mode theory. The polarization dependence of absorption and dual-band sensing, which can be actively tuned by the broken symmetry between two adjacent units, were also discussed. Consequently, this study may open up new avenues for the development of biosensing and imaging applications.

中文翻译：

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基于腔模式共振的高Q超材料，用于太赫兹感测应用

受太赫兹（THz）技术发展的启发，对高质量和高灵敏度的THz传感器的需求显着增加。在这项研究中，提出了基于腔模共振的一维金属超材料，用于太赫兹范围的传感应用。由于腔中能量集中度高，所以获得了具有高质量因子的超材料。因此，所提出的装置不仅实现了窄带选择性吸收，而且还表现出了具有高灵敏度，品质因数和品质因数的优异的折射率感测。通过将仿真结果与耦合模式理论进行比较，验证了物理机制。吸收和双频感应的偏振相关性，可以通过两个相邻单元之间对称性的破坏来主动进行调整，还进行了讨论。因此，这项研究可能为生物传感和成像应用的发展开辟新的途径。