太赫兹正六边形光子晶体光纤的液体传感

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d1=2.4 μm、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。

Abstract

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.

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丁润琪, 侯尚林, 雷景丽, 王道斌, 李晓晓, 王慧琴, 曹明华. 太赫兹正六边形光子晶体光纤的液体传感[J]. 发光学报, 2019, 40(2): 272. DING Run-qi, HOU Shang-lin, LEI Jing-li, WANG Dao-bin, LI Xiao-xiao, WANG Hui-qin, CAO Ming-hua. Liquid Sensing of Hexagonal Photonic Crystal Fibers for Terahertz Wave[J]. Chinese Journal of Luminescence, 2019, 40(2): 272.

太赫兹正六边形光子晶体光纤的液体传感

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