PDF(Pubmed)
Abstract：
Terahertz (THz) spectroscopy has demonstrated significant potential for substance detection due to its low destructiveness and due to the abundance of molecular fingerprint absorption signatures that it contains. However, there is limited research on the fingerprint detection of substances at different temperatures. Here, we propose a THz metamaterial slit array sensor that exploits localized surface plasmons to enhance the electric field within the slit. The transmission peak frequency can be modulated via temperature adjustments. This method enables the detection of molecular absorption characteristics at multiple spectral frequency points, thereby achieving a specific and highly sensitive detection of characteristic analyte fingerprint spectra. Additionally, the sensor supports the detection of substances at multiple temperatures and sensitively identifies changes in their absorption properties as a function of temperature. Our research has employed temperature variation to achieve a highly sensitive and specific detection of trace analytes, offering a new solution for THz molecular detection.
摘要：
太赫兹(THz)光谱学由于其低破坏性和由于其包含的丰富的分子指纹吸收特征而显示出用于物质检测的巨大潜力。然而,关于不同温度下物质的指纹检测的研究有限。这里,我们提出了一种THz超材料狭缝阵列传感器，该传感器利用局部表面等离子体激元来增强狭缝内的电场。可以通过温度调节来调制传输峰值频率。该方法能够在多个光谱频率点检测分子吸收特性,从而实现对特征分析物指纹谱的特异性和高灵敏度检测。此外,传感器支持在多个温度下检测物质，并灵敏地识别其吸收特性随温度的变化。我们的研究采用温度变化来实现痕量分析物的高灵敏度和特异性检测，为THz分子检测提供新的解决方案。
