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<p>This study presents an innovative terahertz biosensor design combining graphene and methylammonium lead iodide (CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>) perovskite metasurfaces for detecting waterborne bacteria. Through systematic optimization using COMSOL Multiphysics simulations, the sensor demonstrates exceptional performance characteristics in the 0.3–0.7 THz range. Key performance metrics include a detection limit of 0.146 RIU, figure of merit of 9.820 RIU<sup>−1</sup>, and sensitivity of 638&#xa0;GHz.RIU<sup>−1</sup>. The sensor’s response was comprehensively characterized by analyzing the effects of graphene chemical potential modulation, geometric parameters, and electromagnetic wave incident angles. Electric field distribution analysis revealed strong wave-structure interactions in the terahertz regime, particularly at 0.5 THz. The sensor exhibits superior sensitivity compared to existing platforms, making it promising for rapid, label-free detection of waterborne pathogens in environmental monitoring applications.</p>

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High-Sensitivity Terahertz Plasmon Resonance Biosensor Incorporating Graphene-Perovskite Metasurfaces for Waterborne BactefInformaticsrial Detection

  • 期刊论文

  • 发表日期：

    2025年4月22日

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  • Abdessalem Bouhenna,
  • Oussama Zeggai,
  • Hocine Ahmed,
  • Jacob Wekalao,
  • Achouak Achour,
  • Mousaab Belarbi,
  • Hadj Mouloudj

摘要

This study presents an innovative terahertz biosensor design combining graphene and methylammonium lead iodide (CH3NH3PbI3) perovskite metasurfaces for detecting waterborne bacteria. Through systematic optimization using COMSOL Multiphysics simulations, the sensor demonstrates exceptional performance characteristics in the 0.3–0.7 THz range. Key performance metrics include a detection limit of 0.146 RIU, figure of merit of 9.820 RIU−1, and sensitivity of 638 GHz.RIU−1. The sensor’s response was comprehensively characterized by analyzing the effects of graphene chemical potential modulation, geometric parameters, and electromagnetic wave incident angles. Electric field distribution analysis revealed strong wave-structure interactions in the terahertz regime, particularly at 0.5 THz. The sensor exhibits superior sensitivity compared to existing platforms, making it promising for rapid, label-free detection of waterborne pathogens in environmental monitoring applications.