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<p>Significant efforts have been made to explore the lossy mode resonance (LMR) sensors. This work presents a dual-core photonic crystal fiber LMR (PCF-LMR) sensor with perovskite coatings, enabling the simultaneous generation of dual LMR effect. The diameter of micro-nano fiber is comparable to the near-infrared wavelength, which is fascinating for optical sensing on the micro-nano scale. The perovskite films with specific thickness and central angles are coated at both ends of the fiber, and finite element method is utilized to analyze the sensing performance. The PCF-LMR sensor achieves a maximum sensitivity of 92,000 nm/RIU at a surrounding refractive index (SRI) of 1.4212. The figure of merit is 716.5 RIU<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11468_2025_3114_Article_IEq1.gif" Format="GIF" Height="11" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">\(^{-1}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </mmultiscripts> </math></EquationSource> </InlineEquation> at the SRI of 1.415. The fabrication tolerance in coating thickness is assessed by the impact on the resonance peaks, which demonstrates that the sensor has good robustness. The dual-core PCF-LMR sensor with ultrahigh sensitivity has great potential for future applications in environmental monitoring, biosensing, gas detection, and other various fields.</p>

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A Highly Sensitive Dual-Core Micro-Nano Photonic Crystal Fiber Sensor with Perovskite Coatings Based on Lossy Mode Resonance

  • 期刊论文

  • 发表日期：

    2025年6月18日

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  • Leilei Ma,
  • Yi Du,
  • Zhixuan Fan,
  • Ying He,
  • Run Xu,
  • Yanfang Yang,
  • Yan Zhu

摘要

Significant efforts have been made to explore the lossy mode resonance (LMR) sensors. This work presents a dual-core photonic crystal fiber LMR (PCF-LMR) sensor with perovskite coatings, enabling the simultaneous generation of dual LMR effect. The diameter of micro-nano fiber is comparable to the near-infrared wavelength, which is fascinating for optical sensing on the micro-nano scale. The perovskite films with specific thickness and central angles are coated at both ends of the fiber, and finite element method is utilized to analyze the sensing performance. The PCF-LMR sensor achieves a maximum sensitivity of 92,000 nm/RIU at a surrounding refractive index (SRI) of 1.4212. The figure of merit is 716.5 RIU \(^{-1}\) - 1 at the SRI of 1.415. The fabrication tolerance in coating thickness is assessed by the impact on the resonance peaks, which demonstrates that the sensor has good robustness. The dual-core PCF-LMR sensor with ultrahigh sensitivity has great potential for future applications in environmental monitoring, biosensing, gas detection, and other various fields.