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<p>In this paper a 2D photonic crystals (PC) based sensor has been designed using a PC ring resonator (PCRR) for bacteria detection in drinkable water. The proposed sensor used an oval shaped PCRR on triangular lattice of silicon rods in air. The designed sensor exhibited high sensitivity for various bacterial contaminations alongside with high quality factor (QF). The sensor achieved maximal sensitivity equals to 818&#xa0;nm/RIU (nm per refractive index units) and QF as high as 4421.2, these results achieved after many experiments and changes in the proposed structure to maximize the sensor proprieties and characteristics. The bacteria presence in water causes a change to its refractive index which results a shift to output transmission spectrum wavelength and that is the sensing mechanism used in this work. The finite difference domain-time method is applied in conjunction with plane-wave expansion approach for resulting simulations and calculations.</p>

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Theoretical Study of Two-Dimensional Photonic Crystal Ring Resonator-Based Sensor for Bacteria Detection in Drinkable Water

  • 期刊论文

  • 发表日期：

    2025年8月6日

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  • Abdellah Djamaa,
  • Ahlem Benmerkhi,
  • Mohamed Bouchemat

摘要

In this paper a 2D photonic crystals (PC) based sensor has been designed using a PC ring resonator (PCRR) for bacteria detection in drinkable water. The proposed sensor used an oval shaped PCRR on triangular lattice of silicon rods in air. The designed sensor exhibited high sensitivity for various bacterial contaminations alongside with high quality factor (QF). The sensor achieved maximal sensitivity equals to 818 nm/RIU (nm per refractive index units) and QF as high as 4421.2, these results achieved after many experiments and changes in the proposed structure to maximize the sensor proprieties and characteristics. The bacteria presence in water causes a change to its refractive index which results a shift to output transmission spectrum wavelength and that is the sensing mechanism used in this work. The finite difference domain-time method is applied in conjunction with plane-wave expansion approach for resulting simulations and calculations.