Scholarlink

<p>This paper presents the development of an optical refractive index sensor for detecting glucose concentration in water. The proposed structure is based on a plasmonic slot nanodisk resonator incorporating two internal triangular sectors. Its optical and sensing performance was evaluated using full-wave numerical analysis with the finite element method. Optimization of structural and sensing parameters was performed using a novel figure-of-merit equation, which reduced computational effort while enhancing key optical metrics, including free spectral range, extinction ratio, full width at half maximum, sensitivity, and figure of merit. In the liquid phase, the sensor achieved a sensitivity of 618&#xa0;nm/RIU, a figure of merit of 432 1/RIU, and a quality factor of 577 at 825&#xa0;nm for glucose concentrations ranging from 0 to 50%. Compared to previous studies with similar resonator dimensions and operating wavelengths, these results demonstrate improvements of up to 108% in quality factor and 58% in figure of merit, with additional performance gains observed in the gas phase. These enhancements are attributed to stronger light–matter interaction in the sensing region, enabled by improved optical confinement from the excitation of edge and cavity modes. The proposed sensor shows strong potential for integration into on-chip photonic devices for medical diagnostics and environmental monitoring.</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

Design and evaluation of a high-performance glucose sensor based on a plasmonic nanodisk resonator utilizing triangular sectors

  • 期刊论文

  • 发表日期：

    2025年10月25日

查看全文
  • Kaveh Moeinimaleki,
  • Amir Habibzadeh-Sharif

摘要

This paper presents the development of an optical refractive index sensor for detecting glucose concentration in water. The proposed structure is based on a plasmonic slot nanodisk resonator incorporating two internal triangular sectors. Its optical and sensing performance was evaluated using full-wave numerical analysis with the finite element method. Optimization of structural and sensing parameters was performed using a novel figure-of-merit equation, which reduced computational effort while enhancing key optical metrics, including free spectral range, extinction ratio, full width at half maximum, sensitivity, and figure of merit. In the liquid phase, the sensor achieved a sensitivity of 618 nm/RIU, a figure of merit of 432 1/RIU, and a quality factor of 577 at 825 nm for glucose concentrations ranging from 0 to 50%. Compared to previous studies with similar resonator dimensions and operating wavelengths, these results demonstrate improvements of up to 108% in quality factor and 58% in figure of merit, with additional performance gains observed in the gas phase. These enhancements are attributed to stronger light–matter interaction in the sensing region, enabled by improved optical confinement from the excitation of edge and cavity modes. The proposed sensor shows strong potential for integration into on-chip photonic devices for medical diagnostics and environmental monitoring.