开环光子晶体光纤化学传感器的设计  

Degsin of open-loop photonic crystal fiber chemical sensor

作　　者：朱子益 常敏[1] 莫宛霖 刘学静 ZHU Ziyi;CHANG Min;MO Wanlin;LIU Xuejing(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2023年第4期80-87,共8页Optical Instruments

基　　金：国家重点研发计划(2021YFF0600902)。

摘　　要：为了提高低折射率化学物质监测的灵敏度,采用光子晶体光纤设计了一种在开环内镀有金薄膜的表面等离子体共振传感器。利用仿真软件COMSOL Multiphysics 5.6系统地研究了开环半径、内部气孔大小、金属膜层厚度对该传感器灵敏度的影响。最终在2800~4700 nm的工作波段内设计出折射率检测范围为1.26~1.31的低折射率传感器。该传感器平均灵敏度高达22500 nm/RIU,最高灵敏度达33000 nm/RIU。在七氟醚、卤代醚、含氟有机物等低折射率物质检测方向具有较好的应用前景。In order to improve the sensitivity of low refraction chemical monitoring,a surface plasmon resonance sensor based on photonic crystal fiber with gold film in open loop was designed in this paper.The effects of open-loop radius,pore size and thickness of metal film on the sensitivity of the sensor were studied systematically by using COMSOL Multiphysics 5.6.Finally,a low refractive index sensor with a refractive index detection range of 1.26-1.31 was designed in the working band of 2800-4700 nm.The average sensitivity of the sensor is as high as 22500 nm/RIU,and the highest sensitivity is 33000 nm/RIU.It has a good application prospect in the detection of low refractive index substances such as sevoflurane,haloether and fluorine-containing organic compounds.

关 键 词：低折射率检测 光子晶体光纤 高灵敏度 宽工作波段 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]