基于表面等离子体的光子晶体光纤传感器研究

发布时间：2018-07-12 09:09

本文选题：表面等离子体 + 光子晶体光纤　；参考：《南京邮电大学》2017年硕士论文

【摘要】：传感器是物联网发展不可缺少的核心技术,起着信息感知的重要作用。随着光纤技术的发展,以光纤为载体的光纤传感器也随之产生。伴随着光子晶体光纤的出现,因其结构的灵活性和奇特的性质在传感器研究领域中而备受关注。很多的研究人员用它来代替传统光纤来进行传感器的研究工作。表面等离子体共振原理因其对环境折射率的异常敏感在折射率传感器研究领域中而备受关注。将光子晶体光纤和表面等离子体共振结合起来所产生的基于表面等离子体光子晶体光纤传感器在传感器领域备受人们的关注。深入开展该类传感器的研究,对于物联网的应用具有重要意义。本文提出了一种三角晶格的六边形结构铂薄膜等离子体光子晶体光纤折射率传感器。该传感器的金属铂薄膜在光子晶体光纤外表面,并且可以直接放在待测液体中进行测量,可以简化制作过程和测量过程。采用有限元仿真软件COMSOL Multiphysics对其进行数值仿真。通过仿真结果可以得出测量液体的折射率范围为1.31-1.38,最大灵敏度6000nm/RIU。另外,由于铂薄膜等离子体光子晶体光纤传感器的测量范围有限。本文提出了银薄膜等离子体光子晶体光纤传感器。该传感器在铂薄膜等离子体光子晶体光纤折射率传感器结构的基础上,将金属铂换成金属银,测量液体折射率范围是1.39-1.42,最大灵敏度为14000nm/RIU。本文提出的传感器结构简单,灵敏度较高,组合以后可以扩大传感器的测量范围,在浓度测量、生化检测、环境检测等方面具有潜在的应用价值。
[Abstract]:Sensor is an indispensable core technology in the development of the Internet of things, and plays an important role in information perception. With the development of optical fiber technology, optical fiber sensor with optical fiber as carrier is also produced. With the appearance of photonic crystal fiber (PCF), it has attracted much attention because of its flexibility and peculiar properties. Many researchers use it to replace conventional optical fibers for sensor research. The principle of surface plasmon resonance (SPR) has attracted much attention because of its unusual sensitivity to environmental refractive index in the field of refractive index sensors. The surface plasma-based photonic crystal fiber sensor, which combines photonic crystal fiber and surface plasmon resonance, has attracted much attention in the sensor field. The research of this kind of sensors is of great significance for the application of the Internet of things. In this paper, a hexagonal planar plasma photonic crystal fiber refractive index sensor with triangular lattice is proposed. The platinum film of the sensor is located on the outer surface of the photonic crystal fiber and can be directly measured in the liquid to be measured. The fabrication and measurement process can be simplified. Finite element simulation software COMSOL Multiphysics is used to simulate it. The results of simulation show that the refractive index range of liquid is 1.31-1.38, and the maximum sensitivity is 6000nm / r RIU. In addition, due to the limited measurement range of platinum thin film plasma photonic crystal fiber sensor. A silver thin film plasma photonic crystal fiber sensor is presented in this paper. Based on the structure of platinum thin film plasma photonic crystal fiber refractive index sensor, the metal platinum is replaced by silver. The refractive index of liquid is measured in the range of 1.39-1.42, and the maximum sensitivity is 14000nm / r RIU. The sensor proposed in this paper is simple in structure and high in sensitivity. It can expand the range of sensor measurement after the combination. It has potential application value in concentration measurement, biochemical detection, environmental detection and so on.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212

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