If we place a SPR sensor device between the electromagnet and varying the intensity of electric and magnetic field. How does sensor behaves especially when external electric field and evanescent field make resonance?
SPR stands for surface plasmon resonance. The surface plasmon frequency is a property of the material. External electric and magnetic field primarily should not affect the plasmon frequency. It can however act as disturbance for its performance as a sensor.
External electromagnetic fields have the potential to cause interference, which can result in noise in the SPR signal, as far as I am aware. Variations in the baseline signal can be caused by electromagnetic interference (EMI), which makes it difficult to differentiate between specific binding events and background noise. Moreover, alterations in the electromagnetic field have the potential to cause currents to be induced in the metallic layers of the SPR sensor, which might result in the surface plasmons' characteristics being altered. As a result of this induction, the resonance angle may fluctuate, which will have an impact on the accuracy of the readings taken by the sensor.
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