太赫兹辐射
光学
太赫兹光谱与技术
毒死蜱
太赫兹超材料
光电子学
材料科学
超材料
折射率
物理
远红外激光器
农学
生物
杀虫剂
激光器
作者
Tao Zhou,Binggang Xiao,Yong Du,Jianyuan Qin
出处
期刊:Photonics Research
[Optica Publishing Group]
日期:2025-02-19
卷期号:13 (5): 1158-1158
被引量:4
摘要
Pesticide residues in tea are an important problem affecting the sustainable development of the tea industry; thus, pesticide detection is the key to ensuring the quality and safety of tea. Here, a terahertz metasurface structure based on the quasi-bound state in the continuum is proposed, which consists of two copper microrods arranged periodically. This design in the metasurface provides strong local enhancement near the surface of the microstructure, significantly improving the interaction of light with the analyte, resulting in increased sensitivity. The simulated and experimental results show that the metasurface structure can be used to detect the refractive index of trace analytes with a high sensitivity and successfully detect low concentrations of chlorpyrifos in tea. This study provides a new idea for the detection of pesticide residues in tea.
科研通智能强力驱动
Strongly Powered by AbleSci AI