Abstract. A photonic crystal fiber (PCF) made up of a spider-web such as cladding and an octagonal core is proposed for sensing applications. Three widely used industrial liquids and/or by-products, namely, water, acetic acid, and glycerol, have been investigated using the full vector finite element method. Extremely high sensitivities of 99.5%, 99.7%, and 99.9% were achieved at 4.5 THz for water, acetic acid, and glycerol, respectively. In addition to the sensitivity, extremely low effective material losses of 0.0004138, 0.000306, and 0.000113 cm − 1 were achieved for water, acetic acid, and glycerol, respectively. Other parameters such as confinement loss, nonlinearity, and dispersion equally showed well-enhanced results compared to previous related works. The excellent sensing performance and ultralow confinement loss of this proposed PCF chemical-sensor make it a worthy candidate for use in many industrial sectors.

中文翻译：

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用于化学传感的蜘蛛网超灵敏太赫兹光子晶体光纤

摘要。由蜘蛛网（例如包层）和八角形纤芯组成的光子晶体光纤 (PCF) 被提议用于传感应用。已经使用全矢量有限元方法研究了三种广泛使用的工业液体和/或副产品，即水、乙酸和甘油。在 4.5 THz 频率下，水、乙酸和甘油分别达到了 99.5%、99.7% 和 99.9% 的极高灵敏度。除了灵敏度之外，水、乙酸和甘油的有效材料损失分别为 0.0004138、0.000306 和 0.000113 cm - 1。与之前的相关工作相比，其他参数（例如限制损失、非线性和色散）同样显示出增强的结果。