This study introduces a sensor consisting of a metal-insulator-metal (MIM) structure, having an integration of gold nanorods and gratings, to perform various functions including sensing refractive index, detecting blood components, monitoring temperature, and measuring magnetic fields. The sensor's spectral properties are studied analytically in the MIR region implementing finite element method. Furthermore, the potential in the RI sensing is extensively examined by modulating the geometrical parameters, ultimately establishing a direct relationship with the transmittance profile. Following computational experiments, the best possible configuration exhibits the maximum sensitivity of 6118.685 nm/RIU. This research shows the biosensing applications by the detection of near-infrared and visible blood components such RBC, Hb, WBC, plasma, and water with a high sensitivity of 3185.05 nm/RIU. Moreover, ethanol is employed to evaluate the proffered sensor's temperature sensing feature and a maximum sensitivity 1.18 nm/°C was attained. Furthermore, this sensor can be used for magnetic field detection as it shows a high magnetic field sensitivity of 354.66 pm/Oe. The structural model is simple. Besides, this design has the potential to serve as a substitute for sensors that rely on silver. It is chemically stable and performs well in refractive index measurement, biosensing, temperature sensing and magnetic field detection.

这项研究介绍了一种由金属-绝缘体-金属（MIM）结构组成的传感器，集成了金纳米棒和光栅，可以执行多种功能，包括传感折射率、检测血液成分、监测温度和测量磁场。采用有限元方法在中红外区域分析研究了传感器的光谱特性。此外，通过调制几何参数来广泛研究 RI 传感的潜力，最终建立与透射率曲线的直接关系。经过计算实验，最佳配置显示出 6118.685 nm/RIU 的最大灵敏度。这项研究展示了通过以 3185.05 nm/RIU 的高灵敏度检测近红外和可见血液成分（如红细胞、血红蛋白、白细胞、血浆和水）的生物传感应用。此外，使用乙醇来评估所提供的传感器的温度传感特性，并获得了 1.18 nm/°C 的最大灵敏度。此外，该传感器可用于磁场检测，因为它具有 354.66 pm/Oe 的高磁场灵敏度。结构模型简单。此外，这种设计有可能成为依赖银的传感器的替代品。它化学性质稳定，在折射率测量、生物传感、温度传感和磁场检测方面表现良好。