Scholarlink

<p>This paper proposes a photonic crystal fibre (PCF) sensor designed for detecting volatile organic compounds (VOCs), specifically benzene, toluene, and p-xylene, within the terahertz frequency range of 0.6 to 3.0&#xa0;THz. The sensor features a large circular core holes and two layers of circular air holes arranged in a circular lattice, which enhances light-analyte interaction and optical confinement. The design and numerical analysis were conducted using COMSOL Multiphysics (version 5.6) with the finite element method (FEM) to evaluate key optical properties, including effective refractive index, relative sensitivity, power fraction, confinement loss, effective area, and numerical aperture. The results indicate that at an optimum frequency of 1.0&#xa0;THz, the proposed sensor achieves high relative sensitivity values of 99.6% for benzene, 99.92% for toluene, and 99.91% for p-xylene, with ultra-low confinement losses in the order of 10<sup>–13</sup> to 10<sup>–14</sup>&#xa0;dB/m. These findings demonstrate the sensor’s potential for highly sensitive VOC detection in industrial and medical applications. Moreover, the simplicity of the PCF structure enhances its feasibility for fabrication and practical implementation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Nolvel photonic crystal fiber biosensors for detecting volatile organic compounds in the terahertz region

  • 期刊论文

  • 发表日期：

    2025年5月15日

查看全文
  • Nur Basirah Mamit,
  • Abdul Mu’iz Maidi,
  • Nianyu Zou,
  • Feroza Begum

摘要

This paper proposes a photonic crystal fibre (PCF) sensor designed for detecting volatile organic compounds (VOCs), specifically benzene, toluene, and p-xylene, within the terahertz frequency range of 0.6 to 3.0 THz. The sensor features a large circular core holes and two layers of circular air holes arranged in a circular lattice, which enhances light-analyte interaction and optical confinement. The design and numerical analysis were conducted using COMSOL Multiphysics (version 5.6) with the finite element method (FEM) to evaluate key optical properties, including effective refractive index, relative sensitivity, power fraction, confinement loss, effective area, and numerical aperture. The results indicate that at an optimum frequency of 1.0 THz, the proposed sensor achieves high relative sensitivity values of 99.6% for benzene, 99.92% for toluene, and 99.91% for p-xylene, with ultra-low confinement losses in the order of 10–13 to 10–14 dB/m. These findings demonstrate the sensor’s potential for highly sensitive VOC detection in industrial and medical applications. Moreover, the simplicity of the PCF structure enhances its feasibility for fabrication and practical implementation.