A Numerical an‎d Experimental Study on the Temperature Influence on the Performance of Surface Plasmon Resonance (SPR) Sensors in Kretschmann Configuration

5/20/2026 12:00:00 AM

Surface Plasmon Resonance (SPR)-based sensors have gained widespread applications in biological, chemical, an‎d environmental fields due to their high sensitivity an‎d rapid response. In this thesis, the effect of gradual temperature increases on the performance of an SPR sensor based on the Kretschmann configuration—including a prism an‎d two metallic layers (chromium an‎d gold)—is experimentally investigated using three distinct methods, an‎d the results are compared. To enable a comparison between experimental an‎d computational results, a computer program was developed based on theoretical relations. The three experimental methods used in this study are referred to as the “multi-step imaging method,” the “single-step imaging method,” an‎d the “optical signal measurement using photodetector an‎d oscilloscope.” In the computational analysis, the effect of temperature was applied individually to the refractive index of the prism, the metallic layers (chromium an‎d gold), an‎d the dielectric environment (air), an‎d the outcomes were extracted separately. The results show that increasing the temperature leads to a shift in the resonance angle toward higher values an‎d a reduction in the depth of the SPR dip in the reflectance curve. Furthermore, the comparison of experimental outcomes reveals that, depending on the application an‎d experimental conditions, each method can offer superior accuracy an‎d performance. These findings can contribute to selec‎ting the appropriate method an‎d optimizing SPR sensor design for temperature-dependent applications.

تشديد پلاسمون سطحي , پيكربندي كرشمن , شدت و بازتاب , دما

Surface Plasmon Resonance , Kretchman configuration , Intensity an‎d Reflection , Temperature

Bita Delfan Azari

Mohammad Hossein Mahdieh, Mahdi Shayganmanesh