We have designed, fabricated, and experimentally verified highly sensitive all-dielectric metasurface THz absorbers (AMTAs) device in the terahertz (THz) frequency range. By designing different structures of the resonant, different types of absorber, which have perfect absorption can be realized. The proposed AMTA with simplified designs is demonstrated by single-layer all-silicon array. Furthermore, the simulated results of absorption frequency changes under different refractive index demonstrate that the proposed AMTAs can act as refractive index sensors in the biochemical application, such as detection of liquid paraffin, cancer cells, and ethanol. Also, experiments of detecting different concentrations of 2, 4-Dichlorophenoxyacetic acid (2, 4-D) have demonstrated that the proposed absorbers have great potential to improve the performance in biological and chemical sensing. These results show that the AMTAs can be used as sensors, which can detect the presence of trace pesticides and residues of some chemicals in adsorption analyses, among other practical applications.

中文翻译：

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全介电超表面太赫兹吸收器的特性和传感性能

我们设计、制造并实验验证了太赫兹 (THz) 频率范围内的高灵敏度全介电超表面太赫兹吸收器 (AMTA) 设备。通过设计不同结构的谐振器，可以实现不同类型的吸波器，实现完美的吸波。提出的具有简化设计的 AMTA 由单层全硅阵列证明。此外，不同折射率下吸收频率变化的模拟结果表明，所提出的 AMTA 可以作为生物化学应用中的折射率传感器，如液体石蜡、癌细胞和乙醇的检测。此外，检测不同浓度的 2, 4-二氯苯氧乙酸 (2, 4-D) 已经证明所提出的吸收剂具有提高生物和化学传感性能的巨大潜力。这些结果表明，AMTA 可用作传感器，可在吸附分析等实际应用中检测痕量农药和某些化学品残留的存在。