Design and analysis of a highly sensitive SPR based PCF biosensor with double step dual peak shift sensitivity
Mohammad Rakibul Islam, Mohammad Rakibul Islam, Md Moinul Islam Khan, Ahmad Jarif Yeasir, Fariha Mehjabin, Jannat Ara Mim, Jubair Alam Chowdhury, Tajuddin Ahmed Nahid, Mohibul Islam, Mohibul Islam
Abstract
This paper introduces a comprehensive study of a quad-cluster multi-functional Photonic Crystal Fiber (PCF) sensor where gold and Aluminum doped with zinc oxide (AZO) were used as plasmonic materials. A maximum Amplitude Sensitivity (AS) of 5336 RIU −1 and Wavelength Sensitivity (WS) of 40,500 nm/RIU in y pol was obtained incorporating Gold as plasmonic material. When AZO was included as the plasmonic material, AS of 3763 RIU −1 & WS of 9100 nm/RIU for y polarization were determined. The RI detecting range was increased from 1.32 to 1.43 to 1.19–1.42 after using AZO instead of Au that opens up a new horizon for detection. A novel detection technique, ‘Double Step Dual Peak Shift Sensitivity (DS-DPSS)' was proposed in sensing temperature where highest sensitivity of 1.05 nm/ ° C having resolution of 0.095 °C for x pol. was achieved. Due to its diverse functionality, the suggested sensor represents a significant advancement in the detection of numerous analytes in biochemical applications.