The Role of Magnetic Field on the Tunability of Tamm Plasmon Resonance in Magnetic Sensors Based on the One-Dimensional Photonic Crystals

In this paper, we have theoretically stadied a magnetic field sensor that operates by exciting Tamm plasmon resonance within the framework of one-dimensional photonic crystals. The sensor’s design incorporates a thin metallic layer strategically placed on the upper surface of the photonic crystal structure. To analyze the reflectivity characteristics of this sensor, we have employed several theoretical approaches, including the Drude model, the Faraday effect, and the widely recognized transfer matrix method. Our numerical investigations have highlighted thorough an optimization process directed at enhancing the sensor’s overall performance. In this regard, to get the best performance and sensor’s sensitivity, we explored the influence of various parameters, such as the specific type and thickness of the metallic layer, the different types and thicknesses of the layers constituting the photonic crystal, as well as the angle of incidence of incoming light, on the sensitivity of the sensor. Remarkably, the developed magnetic field sensor exhibited a sensitivity of 0.0016 nm/T, indicating its potential efficacy. This innovative design could be valuable in a wide range of applications related to the detection of magnetic fields, thereby contributing to advancements in this field.