Design and analysis of a highly sensitive SPR based PCF biosensor with double step dual peak shift sensitivity

Mohammad Rakibul Islam; Md Moinul Islam Khan; Ahmad Jarif Yeasir; Fariha Mehjabin; Jannat Ara Mim; Jubair Alam Chowdhury; Tajuddin Ahmed Nahid; Mohibul Islam

doi:10.1016/j.heliyon.2023.e18782

Design and analysis of a highly sensitive SPR based PCF biosensor with double step dual peak shift sensitivity

Heliyon. 2023 Jul 28;9(8):e18782. doi: 10.1016/j.heliyon.2023.e18782. eCollection 2023 Aug.

Authors

Mohammad Rakibul Islam¹, Md Moinul Islam Khan¹, Ahmad Jarif Yeasir¹, Fariha Mehjabin¹, Jannat Ara Mim¹, Jubair Alam Chowdhury¹, Tajuddin Ahmed Nahid¹, Mohibul Islam¹

Affiliation

¹ Electrical and Electronic Engineering Department, Islamic University of Technology, Board Bazar, Gazipur-1704, Bangladesh.

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.

Keywords: Amplitude sensitivity; Double step dual peak shift sensitivity; RI sensor; Surface plasmon resonance; Temperature sensor; Wavelength sensitivity.