Highly sensitive V-groove refractive index sensor based on Box–Behnken design optimization and DNN prediction

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-16 DOI:10.1016/j.optcom.2025.132454

Jing Ma, Hao Wang, Zhengrong Tong, Pengxiang Li

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引用次数: 0

Abstract

A highly sensitive refractive index (RI) sensor based on surface plasmon resonance photonic crystal fiber (SPR-PCF) with a V-groove open channel and hexagonal air holes is proposed in this study. The sensor’s performance is numerically investigated via the Finite Element Method (FEM) implemented in COMSOL Multiphysics. The three structural parameters of polishing depth, gold film thickness, and hole spacing are optimized using the Box–Behnken Design (BBD) response surface method, achieving a maximum wavelength sensitivity of 26,000 nm/RIU and a resolution of

3.85 \times 1 0^{- 6}

RIU. The sensor exhibits a broad detection range covering RI from 1.28 to 1.43. Furthermore, a deep neural network (DNN) model is employed to predict the refractive index by fitting the relationship between the resonance wavelength, loss value, and RI. The model achieves an

R^{2}

of 0.998, outperforming the potential of neural networks in modeling complex nonlinear interactions. The proposed sensor structure provides a novel solution for practical applications.

查看原文本刊更多论文

基于Box-Behnken设计优化和深度神经网络预测的高灵敏度v型折射率传感器

提出了一种基于表面等离子体共振光子晶体光纤（SPR-PCF）的高灵敏度折射率传感器。利用COMSOL Multiphysics中的有限元方法对传感器的性能进行了数值研究。采用Box-Behnken设计（BBD）响应面法对抛光深度、金膜厚度和孔间距三个结构参数进行优化，最大波长灵敏度为26,000 nm/RIU，分辨率为3.85×10−6 RIU。该传感器具有较宽的检测范围，覆盖了从1.28到1.43的RI。利用深度神经网络（DNN）模型拟合共振波长、损耗值和折射率之间的关系来预测折射率。该模型的R2为0.998，超越了神经网络在复杂非线性相互作用建模方面的潜力。该传感器结构为实际应用提供了一种新颖的解决方案。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.