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Ultrasensitive specific sensor based on all-dielectric metasurfaces in the terahertz range

机译：超敏感特定传感器基于Terahertz范围内的全电介质元支流

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An ultrasensitive specific sensor based on all-dielectric metasurfaces in the terahertz range was proposed. The designed metasurfaces consist of multi pairs of tilted silicon bars on a SiO _(2) substrate with a high- Q Fano resonance feature. The peak of this high Q Fano resonance can form a wide reflection spectrum band by scanning the angle of the incident THz waves. Utilizing this angle-scanning strategy, we designed a metasurface sensor and its reflection spectrum band can cover the absorption peak of tyrosine and santonin. By depositing different thicknesses of tyrosine and santonin on the sensor, we have successfully identified them with a detection limit of 6.7 μg cm ~(?2) and 59.35 μg cm ~(?2) , respectively. The performance of the sensor with high sensitivity has been analyzed in detail, showing an exciting prospect for identification of ‘fingerprint’ spectra in the terahertz region.
机译：提出了一种基于Terahertz系列中的全电介质元核的超敏特定传感器。设计的元件包括在SiO _（2）衬底上的多对倾斜硅棒，具有高Q Fano谐振功能。该高Q Fano谐振的峰值可以通过扫描入射THz波的角度来形成宽反射谱带。利用该角度扫描策略，我们设计了一种元表面传感器，其反射谱带可以覆盖酪氨酸和Santonin的吸收峰。通过在传感器上沉积不同厚度的酪氨酸和Santonin，我们已经成功地鉴定了6.7μgcm〜（Δ2）和59.35μgcm〜（Δ2）的检出限。已经详细分析了具有高灵敏度的传感器的性能，显示了在太赫兹地区识别“指纹”光谱的令人兴奋的前景。

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