In this paper, a hollow core photonic crystal fiber (PCF)-based THz chemicals sensor has been presented. Hexagonal shaped hollow core and symmetrical hexagonal air lattices have been used in the cladding section to construct the PCF geometry. The developed PCF-based chemical sensor yields high performance in ethanol, methanol, water and benzene detection in targeted liquid samples in the THz regime, which is nearly 99% at 3 THz. Additionally, it reveals very negligible losses in both polarization modes. In addition, it renders significant improvement in different sensing properties like effective area, effective refractive index, numerical aperture (NA), nonlinear coefficient, spot size and beam divergences because of strategic geometrical arrangements. The performance of the proposed PCF sensor is numerically investigated and designed by COMSOL software v.5.3a. Fabrication feasibility of developed geometry is also stated here.

中文翻译：

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用于液体分析物中化学物质传感的空心光子晶体光纤：设计和分析

本文介绍了一种基于空芯光子晶体光纤 (PCF) 的太赫兹化学传感器。已在包层部分使用六角形空心芯和对称六角形空气晶格来构建 PCF 几何结构。开发的基于 PCF 的化学传感器在 THz 范围内的目标液体样品中检测乙醇、甲醇、水和苯的性能很高，在 3 THz 时接近 99%。此外，它揭示了两种偏振模式下的非常微不足道的损失。此外，由于策略性的几何布置，它显着改善了不同的传感特性，如有效面积、有效折射率、数值孔径 (NA)、非线性系数、光斑尺寸和光束发散度。所提出的 PCF 传感器的性能通过 COMSOL 软件 v.5.3a 进行了数值研究和设计。此处还说明了开发几何结构的制造可行性。