Nowadays, Food additives and preservatives have become a hot topic especially formalin, which is a chemical substance used to preserve food. Chronic cancer is caused by swallowing the formalin-contaminated food on a regular basis. As a result, detection of the formalin in food ingredients is a critical need, and this requirement is becoming increasingly important in new terrains. Therefore, a new approach, planar waveguide-based surface plasmon resonance (SPR) sensor is presented in this paper employing silver-chloride materials-black phosphorus structure to detect the formalin. In this study, the optimization of metal thickness and optimal performance of chloride material are analyzed by observing the transmittance power and resonance shift for conventional and chloride-based sensors, respectively. Moreover, the performance parameters, such as sensitivity of $344^{\circ }/$ RIU, quality-factor of $166.99{\text {RIU}}^{\text {-1}}$ , detection-accuracy of 3.34 and figure-of-merit of 164.74, are observed for the proposed sensor. Furthermore, the performance comparative study is conducted and found that the proposed sensor highlighted the enhanced the SPR sensor and highlighted the performance of FOM. Finally, the electromagnetic filed distributions of the proposed WG-based SPR sensor are shown using the Opti-FDTD software.

中文翻译：

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基于平面波导的 SPR 传感器的设计与分析，用于使用 Ag-Chloride-BP 结构检测福尔马林

如今，食品添加剂和防腐剂已成为热门话题，尤其是福尔马林，这是一种用于保存食品的化学物质。慢性癌症是由于定期吞咽被福尔马林污染的食物引起的。因此，食品成分中福尔马林的检测成为一项关键需求，并且这一要求在新领域变得越来越重要。因此，本文提出了一种基于平面波导的表面等离子体共振（SPR）传感器，采用氯化银材料-黑磷结构来检测福尔马林。在这项研究中，通过观察传统传感器和基于氯化物的传感器的透射率功率和共振偏移，分析了金属厚度的优化和氯化物材料的最佳性能。此外，性能参数， $344^{\circ}/$ RIU，品质因数 $166.99{\text {RIU}}^{\text {-1}}$ ，检测精度为 3.34，品质因数为 164.74，观察到所提出的传感器。此外，进行了性能比较研究，发现所提出的传感器突出了增强的 SPR 传感器并突出了 FOM 的性能。最后，使用 Opti-FDTD 软件显示了所提出的基于 WG 的 SPR 传感器的电磁场分布。