Abstract

Surface plasmon resonance‐based fiber optic sensors with Ag‐SnO2 and Ag‐ZnS bi‐layers are proposed experimentally and compared in detail in terms of sensitivity. Effect of SnO2 and ZnS layer thicknesses on the sensitivity is examined. Largest sensitivities are achieved by sensors with 40 nm Ag‐10 nm SnO2 layers and 40 nm Ag‐10 nm ZnS layers. Sensor with 40 nm Ag‐10 nm SnO2 layers is found to demonstrate better sensitivity than that with 40 nm Ag‐10 nm ZnS layers.

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