论文标题
750 GHz和1100 GHz之间的高损耗液体的片上表征
On-Chip Characterization of High-Loss Liquids between 750 GHz and 1100 GHz
论文作者
论文摘要
Terahertz光谱是一种有前途的工具，用于分析生物分子的皮秒动力学，该动态受周围水分子影响。但是，水会给Terahertz信号造成极大的损失，从而阻止了此频率范围内的敏感测量。在这里，我们提出了使用矢量网络分析仪，接触探针和具有0.1 mm宽的微流体通道的共面向波导的敏感片上的Terahertz光谱。从750-1100 GHz的频率范围的已知参考测量值中提取了各种去离子水/异丙醇浓度的复杂介电性，并且与文献数据非常吻合。结果证明了所提出的方法是高损失液体片上片的高敏感方法，能够解决水的介电特性。
Terahertz spectroscopy is a promising tool for analyzing the picosecond dynamics of biomolecules, which is influenced by surrounding water molecules. However, water causes extreme losses to terahertz signals, preventing sensitive measurements at this frequency range. Here, we present sensitive on-chip terahertz spectroscopy of highly lossy aqueous solutions using a vector network analyzer, contact probes, and a coplanar waveguide with a 0.1 mm wide microfluidic channel. The complex permittivities of various deionized water/isopropyl alcohol concentration are extracted from a known reference measurement across the frequency range 750-1100 GHz and agrees well with literature data. The results prove the presented method as a high-sensitive approach for on-chip terahertz spectroscopy of high-loss liquids, capable of resolving the permittivity of water.
