准晶体结构光纤表面等离子体共振传感器特性研究  

Quasi-crystal photonic fiber surface plasmon resonance sensor

作　　者：廖文英[1] 范万德[1] 李海鹏[1] 隋佳男 曹学伟[1] 

机构地区：[1]南开大学物理科学学院,天津300071

出　　处：《物理学报》2015年第6期217-222,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11174154;11074131);国家基础科学人才培养基金(批准号:J1103208)资助的课题~~

摘　　要：光纤表面等离子体共振传感器在高灵敏度传感和在线实时监测等领域具有重要意义.设计了一种六重准晶体结构环形通道光纤表面等离子体共振传感器,基于有限元法对该传感器的传感特性进行了数值模拟.研究了光纤各结构参量对传感器特性的影响规律.研究结果表明:待测液折射率的有效监测范围为1.25—1.331,最高灵敏度可达26400 nm·RIU-1,传感器具有损耗谱杂峰少、探测范围广、灵敏度高、设计灵活性高和光路可弯曲等特点,在生化检测、公共安全、环境污染监测以及高灵敏度传感等领域具有广泛的应用前景.Fiber-optic surface plasmon resonance sensor （SPR） plays an important role in the fields of high sensitivity sensor and online real time monitor. We propose a novel six-fold symmetric photonic quasi-crystal fiber SPR sensor with two large semi circular channels. Its sensing properties and influence of fiber structure are simulated numerically by the finite element method. Numerical results demonstrate that its highest sensitivity can reach up to 26400 nm·RIU^-1, and the measuring range is 1.25-1.331. The novel quasi-crystal fiber SPR sensor, which has characteristics of large measuring range, high sensitivity, mode loss spectrum with less interference peak, design and optical path flexibility, are used widely for biochemical detection, public safety, environmental pollution monitoring and high sensitivity sensor.

关 键 词：准晶体结构光纤 表面等离子体共振 传感器 灵敏度 

分 类 号：O53[理学—等离子体物理] TP212[理学—物理]