太赫兹正六边形光子晶体光纤的液体传感（英文）

Liquid Sensing of Hexagonal Photonic Crystal Fibers for Terahertz Wave

设计了一种分别填充水、酒精和苯炔等边三角形空气孔纤芯、包层空气孔排列为正六边形结构、以环烯烃共聚物作为基底材料的光子晶体光纤,利用有限元法模拟了0. 3～1. 5 THz频带内的液体传感特性。结果表明,设计的光子晶体光纤的灵敏度系数很高,当纤芯空气孔直径d_1=2. 4μm、包层空气填充比为0. 3时,苯炔在频率0. 3 THz的相对灵敏性系数最高为37. 63%,在1. 5 THz,限制损耗的数量级可以降至10-7。

A photonic crystal fiber with the cladding of circular air holes in hexagonal lattice structure and the core of circular air holes in equilateral triangle lattice structure based on cyclic-olefin copolymer is proposed,the liquid sensing characteristics of the PCF over 0.3-1.5 THz bands are investigated by finite element method.The proposed PCF demonstrates an ultrahigh sensitivity coefficient of 37.63%at 0.3 THz,and the confinement loss is low as the order 10-7 at frequency of 1.5 THz.The results offer reference for designing novel liquid sensors based on PCF at terahertz band.