Investigation of the SPR Sensor Parameters in the Detection of Ammonia Gas

Surface plasmon resonance (SPR) sensors have attracted enormous attention due to their applications in various fields. A novel SPR-based sensor with ZnO and BaTiO3 metal oxide layers is designed for NH3 gas detection. Gold is used as plasmonic material. Moreover, thicknesses of gold and metal oxide layers are optimized to obtain suitable performance parameters. Sensor response is analyzed in terms of minimum reflectance, sensitivity, detection accuracy and quality parameter. Applying ZnO and BaTiO3 layers lead to enhancement of quality parameter and detection accuracy in gold -based sensors. The recommended sensor structure can have potential applications in toxic gas sensing.