Analysis of a highly temperature-sensitive gold-coated plasmonic biosensor for analyte detection

A temperature-sensitive gold coated PCF-based surface plasmon resonance (SPR) biosensor was examined for detecting analytes based on their refractive indices. The proposed sensor attained maximum amplitude sensitivities (AS) of 1432 RIU-1 and 1291 RIU-1, wavelength sensitivities (WS) of 13,500 nm/RIU and 13,000 nm/RIU in X and Y- polarized mode individually in RI spectrum of 1.34- 1.4. Furthermore, the proposed sensor produced ultimate figure of merit (FOM) values of 546.93 RIU-1 and 521.4601 RIU-1 in x and y polarization modes. High birefringence of 1.5 x 10-3 was also computed for the suggested sensor. Additionally, the proposed sensor shows high temperature sensitivity of 4.5833 nm/degrees C with a comparable resolution of 2.18xx10-2 degrees C and a maximum FOM value of 0.101 degrees C-1 in the detection range of -114 degrees C to 78 degrees C in the presence of ethanol as a sensing medium. The reported sensor therefore can be considered as a notable solution for any chemical or biological analytes detection.(c) 2023 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Ain Shams University. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).