基于双通道光子晶体光纤表面等离子体共振的太赫兹折射率与温度双参数传感器

Terahertz Refractive Index and Temperature Dual-Parameter Sensor Based on Surface Plasmon Resonance in Two-Channel Photonic Crystal Fiber.

作者信息

Wang Doudou, Guo Wenchuan, Zou Yizu, Ma Tian, Wang Weifeng, Chen Guoxiang

机构信息

College of Sciences, Xi'an University of Science and Technology, Xi'an 710054, China.

College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

出版信息

Sensors (Basel). 2024 Sep 26;24(19):6225. doi: 10.3390/s24196225.

A terahertz photonic crystal fiber with two sensing channels was designed. Graphene coated on the micro-grooves in the cladding was used as plasma material to introduce tunability. The dispersion relation, mode coupling, and sensing characteristics of the fiber were studied using the finite element method. Ultrahigh sensitivity of 2.014 THz/RIU and 0.734 GHz/°C were obtained for analytes with refractive index in the range of 1.33 to 1.4 and environment temperature in the range of 10-60 °C, respectively. Refractive index resolution can reach the order of 10. The dual parameter simultaneous detection, dynamic tunable characteristics, and working in the low-frequency range of terahertz enable the designed photonic crystal fiber to have application prospects in the field of biosensing.