Jiayuan Liu, Jie Dong, Shanglin Hou, Qingmin Liu, Caijian Xie, Gang Wu, Zuyong Yan
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引用次数: 0
摘要
本文提出了一种由两个传感通道组成的光子晶体光纤(PCF)传感器,用于磁场和温度测量。为了有效检测磁场和温度,该传感器的两个传感通道分别嵌入了金纳米线并填充了聚二甲基硅氧烷(PDMS)和磁性流体(MF)。此外,这种结构简化了制造工艺,并消除了在 PCF 内表面或外表面沉积等离子材料时出现的一些问题。我们采用有限元法(FEM)对拟议传感器的性能进行了数值研究。通过分析 y 偏振核心模式的损耗曲线和能量,最终确定了最佳结构参数。此外,灵敏度对包层气孔的大小并不特别敏感,这表明传感器具有更好的制造容差。仿真结果表明,在磁场为 30-300 Oe 时,最大磁场灵敏度为 238.4 pm/Oe;在温度为 -20-40 °C 时,温度灵敏度为 -1103.6 pm/°C。拟议的传感器能以较高的磁场灵敏度探测零度以下的温度。鉴于其制造复杂度低、探测范围广,这种 PCF-SPR 传感器有望应用于低温磁场环境,如地质勘探、海洋环境监测等。
Design of a Gold-Nanowires Embedded PCF for Magnetic Field and Temperature Sensing
A photonic crystal fiber (PCF) sensor comprising two sensing channels for magnetic field and temperature measurements is proposed. In order to detect the magnetic field and temperature effectively, the two sensing channels of the proposed sensor are embedded with gold nanowires and filled with Polydimethylsiloxane (PDMS) and magnetic fluid (MF), respectively. Additionally, this configuration simplifies the fabrication process and eliminates some problems when plasmonic material is deposited in the inner or outer surface of PCF. The performance of the proposed sensor is numerically investigated by the finite element method (FEM). The optimal structural parameters have been determined by analyzing the loss curves and energy of the y-polarized core mode ultimately. Furthermore, the sensitivity is not particularly sensitive to the sizes of the cladding air holes, indicating the sensor has better manufacturing tolerance. The simulation results reveal the maximum magnetic field sensitivity is 238.4 pm/Oe at the magnetic field of 30–300 Oe, and temperature sensitivity is − 1103.6 pm/°C at the temperature of − 20–40 °C. The proposed sensor can detect sub-zero temperatures with a high magnetic field sensitivity. Given its low fabrication complexity and extensive detection range, this PCF-SPR sensor has potential applications in magnetic environments at low temperatures, such as geological exploration, marine environment monitoring, and so on.
期刊介绍:
Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons.
Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.