Surface plasmon resonance‐based fiber optic sensor utilizing tin oxide and zinc sulfide: An experimental analysis

Surface plasmon resonance‐based fiber optic sensors with Ag‐SnO 2 and Ag‐ZnS bi‐layers are proposed experimentally and compared in detail in terms of sensitivity. Effect of SnO 2 and ZnS layer thicknesses on the sensitivity is examined. Largest sensitivities are achieved by sensors with 40 nm Ag‐10 nm SnO 2 layers and 40 nm Ag‐10 nm ZnS layers. Sensor with 40 nm Ag‐10 nm SnO 2 layers is found to demonstrate better sensitivity than that with 40 nm Ag‐10 nm ZnS layers.