SPR Optical Fiber Sensor Based on Composite Film Modification for Simultaneous Measurement of Refractive Index and Temperature

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

Plasmonics Pub Date : 2026-09-07 DOI:10.1007/s11468-026-03460-7

Guoning Hu, Xili Jing, Dongting Hou

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引用次数: 0

Abstract

By adjusting composite films with different refractive indices, the coupling conditions of surface plasmon resonance (SPR) can be precisely controlled, thereby inducing a controllable redshift in the sensing bandwidth of the sensor. This feature provides a reliable means for effectively separating the dual-channel sensing bandwidths. In this study, we propose a sensor modulated by composite films for the simultaneous and independent measurement of refractive index (RI) and temperature. The RI sensing channel is realized by depositing Ag/MgF₂ films onto the surface of the no-core fiber (NCF), while the temperature sensing channel is implemented by coating the NCF with the Ag/MoS₂/ polydimethylsiloxane (PDMS) films. Experimental results show that the sensor achieves a maximum sensitivity of 7300 nm/RIU in the RI range of 1.33–1.39, and a maximum sensitivity within the temperature range of 30–100 ℃ can reach 4.4 nm/℃. The sensing bandwidth are effectively separated around 800 nm. Through rational design of the film structure, this study provides a feasible solution for achieving high-performance multi-parameter sensing.

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同时测量折射率和温度的复合膜改性SPR光纤传感器

通过调整不同折射率的复合薄膜，可以精确控制表面等离子体共振（SPR）的耦合条件，从而在传感器的传感带宽中诱导可控的红移。该特性为有效分离双通道传感带宽提供了可靠的手段。在这项研究中，我们提出了一种由复合薄膜调制的传感器，用于同时独立测量折射率（RI）和温度。RI传感通道通过在无芯光纤（NCF）表面沉积Ag/MgF2薄膜来实现，而温度传感通道通过在NCF表面涂覆Ag/MoS2/聚二甲基硅氧烷（PDMS）薄膜来实现。实验结果表明，该传感器在1.33 ~ 1.39的RI范围内最大灵敏度可达7300 nm/RIU，在30 ~ 100℃的温度范围内最大灵敏度可达4.4 nm/℃。传感带宽在800 nm左右有效分离。通过对薄膜结构的合理设计，为实现高性能多参数传感提供了可行的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.