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<p>In this research endeavor, we propose a novel tetra-channel Photonic Crystal Fiber (PCF) sensor leveraging Localized Surface Plasmon Resonance (LSPR) technology. Each channel is combined with a different plasmonic material: Au, Ag, AZO and ITO - enabling boosted optical coupling, better sensing results, and an extended operating wavelength. The sensor yields a maximum wavelength sensitivity (WS) of 72,500, 32,419, 16,967, and 16,654&#xa0;nm/RIU and an amplitude sensitivity (AS) of 91, 1050.88, 5645.55, and 1914.75 RIU<sup>− 1</sup> respectively, over the four channels with a resolution in the order of 10<sup>− 6</sup> over a spectrum of 375–1895&#xa0;nm across a refractive index (RI) range of 1.32–1.44. The sensor can also be used as an enhanced single analyte detector by injecting the same sample across the four channels, where it achieves a remarkable Double Peak Shift Sensitivity (DPSS) of 68,262&#xa0;nm/RIU. This innovative design facilitates efficient multi-analyte detection, minimizing cross-contamination and reducing maintenance costs. The unique configuration and outstanding performance metrics position this sensor as a promising platform for next-generation multi-analyte detection systems, especially for contamination-free monitoring in chemical industry.</p>

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Tetra-channel LSPR-PCF sensor integrated with Au, Ag, AZO and ITO for enhanced simultaneous multi-analyte detection

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • Ali Ahnaf Hassan,
  • Sifat Al Shahriar,
  • Abdullah Al Mahmud Nafiz,
  • Russel Reza Mahmud,
  • Shah Md. Salimullah

摘要

In this research endeavor, we propose a novel tetra-channel Photonic Crystal Fiber (PCF) sensor leveraging Localized Surface Plasmon Resonance (LSPR) technology. Each channel is combined with a different plasmonic material: Au, Ag, AZO and ITO - enabling boosted optical coupling, better sensing results, and an extended operating wavelength. The sensor yields a maximum wavelength sensitivity (WS) of 72,500, 32,419, 16,967, and 16,654 nm/RIU and an amplitude sensitivity (AS) of 91, 1050.88, 5645.55, and 1914.75 RIU− 1 respectively, over the four channels with a resolution in the order of 10− 6 over a spectrum of 375–1895 nm across a refractive index (RI) range of 1.32–1.44. The sensor can also be used as an enhanced single analyte detector by injecting the same sample across the four channels, where it achieves a remarkable Double Peak Shift Sensitivity (DPSS) of 68,262 nm/RIU. This innovative design facilitates efficient multi-analyte detection, minimizing cross-contamination and reducing maintenance costs. The unique configuration and outstanding performance metrics position this sensor as a promising platform for next-generation multi-analyte detection systems, especially for contamination-free monitoring in chemical industry.