Ultrasensitive Low-Temperature Sensor based on Silver Nano-Film-Coated Dual-Polarization Photonic Crystal Fiber

IF 5.6 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2026-07-09 DOI:10.1007/s11468-026-03394-0

Jiyu Dong, Yu Feng, Shuhuan Zhang, Zhiyuan Han, Qichao Wang, Xue Li, Bowen Feng, Shaoxiong Wu, Mengyan Wei

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Abstract

To address the urgent demand for ultrasensitive low-temperature measurement technology, a novel D-shaped photonic crystal fiber (PCF) low-temperature sensor is proposed in this study. Based on the surface plasmon resonance (SPR) effect, the sensor adopts a silver nanofilm as the excitation layer and polydimethylsiloxane (PDMS) as the temperature-sensitive material for accurate temperature measurement. The finite element method (FEM) is adopted to simulate and optimize key parameters, including silver nanofilm thickness, polishing depth, and semi-axial dimensions of the elliptical air holes. Simulation results show that at -35℃ to 0℃, the average wavelength sensitivity of the x-polarized mode is 15.36 ~ 17.54 nm/℃ within the 1200 ~ 2500 nm band, and the value reaches 16.50 ~ 18.49 nm/℃ for the y-polarized mode in the 1200 ~ 2700 nm band. Featuring both high sensitivity and environmental adaptability, this low-temperature sensor can be widely applied in fields such as medical cryopreservation, polar environment monitoring, cold chain temperature control and industrial low-temperature process regulation.

Graphical Abstract

(a) Test flow chart of the silver film-coated D-shaped PCF temperature sensor. (b) Linear fitting curve of temperature versus resonance wavelength for the x-polarized core mode of the sensor under corresponding structural parameters. (c) Linear fitting curve of temperature versus resonance wavelength for the y-polarized core mode of the sensor under corresponding structural parameters

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基于银纳米膜双偏振光子晶体光纤的超灵敏低温传感器

针对超灵敏低温测量技术的迫切需求，提出了一种新型的d形光子晶体光纤（PCF）低温传感器。该传感器基于表面等离子体共振（SPR）效应，采用银纳米膜作为激发层，聚二甲基硅氧烷（PDMS）作为温度敏感材料进行精确温度测量。采用有限元法对银纳米膜厚度、抛光深度、椭圆气孔半轴向尺寸等关键参数进行了仿真和优化。仿真结果表明，在-35℃~ 0℃范围内，x偏振模式在1200 ~ 2500 nm波段的平均波长灵敏度为15.36 ~ 17.54 nm/℃，y偏振模式在1200 ~ 2700 nm波段的平均波长灵敏度为16.50 ~ 18.49 nm/℃。该低温传感器具有高灵敏度和环境适应性，可广泛应用于医用低温保存、极地环境监测、冷链温度控制和工业低温过程调节等领域。(a)镀银d形PCF温度传感器的测试流程图。(b)相应结构参数下传感器x偏振芯模温度与共振波长的线性拟合曲线。(c)相应结构参数下传感器y极化芯模温度与共振波长的线性拟合曲线

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

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.