磁场的传感测量在相关领域具有重要应用。利用磁流体的磁光效应, 提出了一种基于光学Tamm态的磁场传感结构。该结构由加载了金属层和电介质层的一维磁流体光子晶体构成。数值研究了该结构的结构参数对传感性能的影响。结果表明, 磁流体层越厚, 探测灵敏度就越高。金属层和电介质层的厚度均存在一个最佳值, 使得传感器具有较高的探测精度。结果还表明, 该传感结构的探测灵敏度优于已报道的采用光子晶体缺陷结构实现的磁场传感器。研究结果为基于光学Tamm态的磁流体磁场传感器的设计制备提供了参考。

The sensing measurement of magnetic field has an important application in related fields. Using the magneto-optical effect of magnetic fluid, a magnetic field sensing structure based on optical Tamm state is proposed. The structure is composed of a one-dimensional magnetic fluid photonic crystal loaded with a metal layer and a dielectric layer. The influence of the structure parameters on the sensing performance is studied numerically. The results show that the thicker is the magnetic fluid layer, the higher is the detection sensitivity. The thickness of the metal layer and the dielectric layer both have an optimal value, so that the sensor has higher detection accuracy. The results also show that the detection sensitivity of the proposed sensing structure is better than that of the reported magnetic field sensor realized by photonic crystal defect structure. The research results provide a reference for the design and fabrication of magnetic fluid magnetic field sensors based on optical Tamm state.