Heliyon (Aug 2023)

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

Journal volume & issue
Vol. 9, no. 8
p. e18782

Abstract

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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.

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