Scholarlink

<p>This work presents a photonic crystal fiber (PCF) sensor with a hollow octagonal core for chemical detection in the terahertz (THz) region. The core region is fully filled with the target analyte, while the surrounding cladding contains periodic air holes that provide strong refractive index contrast for modal confinement. The proposed structure enhances the overlap between the guided electromagnetic field and the analyte, resulting in improved sensing performance. The sensor characteristics are numerically investigated using the finite element method in COMSOL Multiphysics (v5.6) over the frequency range of 0.8–3.0&#xa0;THz. Key performance parameters including relative sensitivity (RS), confinement loss (CL), effective material loss (EML), effective area and total power fraction are analyzed. At 1.6&#xa0;THz, the proposed sensor achieves RS values of 95.47% (ethanol), 96.00% (benzene), and 94.26% (water), with corresponding CL values on the scale of 10<sup>−11</sup>&#xa0;dB/m with lower EML. A comparative analysis in relation to previously developed THz PCF-based sensors demonstrate improved sensitivity and reduced losses. The proposed design can be considered for chemical sensing applications in biomedical, industrial and environmental monitoring fields.</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

Performance evaluation of a photonic crystal fiber based sensor for multi chemical detection in terahertz regime

  • 期刊论文

  • 发表日期：

    2026年4月7日

查看全文
  • Md. Motiur Rahman Tareq,
  • Rabiul Islam,
  • Md. Hasan Marouf Limon,
  • Md. Mahbub Hasan

摘要

This work presents a photonic crystal fiber (PCF) sensor with a hollow octagonal core for chemical detection in the terahertz (THz) region. The core region is fully filled with the target analyte, while the surrounding cladding contains periodic air holes that provide strong refractive index contrast for modal confinement. The proposed structure enhances the overlap between the guided electromagnetic field and the analyte, resulting in improved sensing performance. The sensor characteristics are numerically investigated using the finite element method in COMSOL Multiphysics (v5.6) over the frequency range of 0.8–3.0 THz. Key performance parameters including relative sensitivity (RS), confinement loss (CL), effective material loss (EML), effective area and total power fraction are analyzed. At 1.6 THz, the proposed sensor achieves RS values of 95.47% (ethanol), 96.00% (benzene), and 94.26% (water), with corresponding CL values on the scale of 10−11 dB/m with lower EML. A comparative analysis in relation to previously developed THz PCF-based sensors demonstrate improved sensitivity and reduced losses. The proposed design can be considered for chemical sensing applications in biomedical, industrial and environmental monitoring fields.