@article{Kadhum_Alikan_Mohammed_Al-Zuky_Al-Saleh_2024, title={Simulation of (Na-Ta2O5 ) angular interrogation surface plasmon resonance sensor for toluene (C7H8 ) liquids}, url={https://oiccpress.com/journal-of-theoretical-and-applied-physics/article/simulation-of-na-ta2o5-angular-interrogation-surface-plasmon-resonance-sensor-for-toluene-c7h8-liquids/}, DOI={10.57647/j.jtap.2024.si-AICIS23.04}, abstractNote={Surface plasmon resonance (SPR) is a very sensitive technique for keeping track of changes in the optical properties close to the sensor surface. In the Kretschmann configuration, it can be triggered by an evanescent field resulting from total internal reflection from the rear of the sensor surface. The layers were deposited on the semicircular glass prism LASF35 using toluene (C7H8) as a sensing medium. The simulation model was created at a sodium (Na) layer thickness of (dNa) (dNa = 50 nm) layers and at varying thicknesses of tantalum pentoxide (Ta2O5) (dTa2O5 ).The parameters of the surface plasmon resonance angle (SPR) were computed. SPR occurred strongly and well in the IR area at (800, 900) nm when it was not seen in the ultraviolet region (100 nm) and appeared in the visible region at 500, 600, and 700 nm. The visible region’s highest sensitivity (S = 190) occurred at 700 nm, where the sodium layer thickness (dNa) values of SPR dip length (Ld) and full width half maximum (FWHM) were excellent (50 nm). As a result, the suggested sensor can operate at wavelengths of 500, 600, 700, 800, and 900 nm in the IR-visible range.}, journal={Journal of Theoretical and Applied Physics}, publisher={OICC Press}, author={Kadhum, Farah Jawad and Alikan, Jasim Shamki and Mohammed, Sahar A. and Al-Zuky, Ali Abid Dawood and Al-Saleh, Anwar Hassan}, year={2024}, month={Jul.}, keywords={Surface plasmon resonance Angular interrogation, Liquid sensor, Theoretical model, Sensitivity} }