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Plasmonic Metal-Insulator-Metal (MIM) Refractive Index Sensor for Glucose Level Monitoring

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Abstract

In this article, we introduce a novel H-shaped plasmonic refractive index (RI) sensor coupled with a bus waveguide. The sensor is designed to interact with a straight metal-insulator-metal (MIM) waveguide configuration. To analyze the proposed structure, the finite element method (FEM) is employed, allowing for a comprehensive numerical investigation. The primary function of this sensor is to detect changes in RI by monitoring alterations in the resonant wavelength. The sensing mechanism involves the interaction of light with the plasmonic structure, and any variations in the RI of the surrounding medium induce changes in the resonant wavelength of the sensor. This phenomenon is crucial for applications such as biosensing and chemical analysis. To optimize the sensor’s performance, the authors conducted a thorough process of geometric parameter optimization. Consequently, the recorded maximum sensitivity of the sensor, reported as 1960 nm/RIU for mode 2 and 1420 nm/RIU for mode 1, underscores its exceptional capability to discern minute quantities of molecules, showcasing a heightened sensitivity that sets it apart in molecular detection applications. Furthermore, we extend the applicability of their proposed sensor by numerically analyzing its performance in measuring the glucose content of blood. This highlights the versatility of the sensor, showcasing its potential for biomedical applications.

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Authors and Affiliations

  1. Department of Computer Science and Engineering, Jashore University of Science and Technology, Sadhinata Sarak, Jashore, 7408, Khulna, Bangladesh

    Rizwanur Rahad, Ahsan Ali, Md. Khaled Hasan Pias, Mahian Farabi, Md. Asadul Islam & Abdullah Al Fahim

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  1. Rizwanur Rahad
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  2. Ahsan Ali
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  3. Md. Khaled Hasan Pias
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  4. Mahian Farabi
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  5. Md. Asadul Islam
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  6. Abdullah Al Fahim
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Contributions

The authors confirm their contribution to the paper as follows: study conception and design, data collection, analysis and interpretation of results, draft manuscript preparation: Rizwanur Rahad; study conception and design, analysis: Ahsan Ali and Mahian Frabi; interpretation of results, manuscript preparation: Md. Khaled Hasan Pias; Analysis and interpretation of results, manuscript preparation: Md. Asadul Islam, and Abdullah Al Fahim

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Correspondence to Rizwanur Rahad.

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Rahad, R., Ali, A., Pias, M.K.H. et al. Plasmonic Metal-Insulator-Metal (MIM) Refractive Index Sensor for Glucose Level Monitoring. Plasmonics (2024). https://doi.org/10.1007/s11468-024-02201-y

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