| 蝶形太赫兹波导在微量溶液浓度检测中的性能研究 |
| 投稿时间：2024-10-31 修订日期：2024-11-10 点此下载全文 |
| 引用本文：王路彬,张慧睿,王江涛,武京治,王艳红.蝶形太赫兹波导在微量溶液浓度检测中的性能研究[J].红外,2025,46(3):47~52 |
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| 基金项目:装备预研项目 |
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| 中文摘要:提出了一种基于等离激元效应的蝶形太赫兹波导传感器。利用该太赫兹波导在特定频率处的谐振特性来探测溶液浓度变化。通过分析太赫兹波导传感器的S11反射参数，观察到在频率53.28 GHz处，波导结构出现Q值为82.28的谐振谷。在波导蝶形区域设置不同浓度的分析物时，产生了双谐振谷且发生了频率偏移；谐振频率随着溶液浓度的增加产生蓝移，表明溶液的介电常数影响了波导中的电磁场分布。仿真结果验证了不同浓度下乳糖溶液S11反射参数的频移规律，灵敏度可达0.075 GHz/(g/L)。与传统的传感器检测方法相比，本传感器能够提供更高的灵敏度，可精确反映微量溶液浓度的微小变化。 |
| 中文关键词:等离激元 太赫兹 高Q值 谐振频率 浓度检测 |
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| Performance Study of Butterfly-Shaped Terahertz Waveguide in Trace Solution Concentration Detection |
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| Abstract:A butterfly-shaped terahertz waveguide sensor based on the plasmon effect is proposed. The resonance characteristics of the terahertz waveguide at a specific frequency are used to detect changes in solution concentration. By analyzing the S11 reflection parameters of the terahertz waveguide sensor, it is observed that at a frequency of 53.28 GHz, a resonance dip with a Q-value of 82.28 appears in the waveguide structure. When different concentrations of analytes are set in the butterfly-shaped region of the waveguide, dual resonance dips are generated and frequency shifts occur; the resonance frequency exhibits a blue shift with the increase of solution concentration, indicating that the dielectric constant of the solution affects the electromagnetic field distribution in the waveguide. The simulation results verify the frequency shift law of the S11 reflection parameters of lactose solutions at different concentrations, and the sensitivity can reach 0.075 GHz/(g/L). Compared with traditional sensor detection methods, this sensor can provide higher sensitivity, accurately reflecting small changes in the concentration of trace solutions. |
| keywords:plasmon Terahertz high Q-value resonant frequency concentration detection |
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