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Plasmonic Refractive Index Sensor Based on Ring-Type Pentagonal Resonator with High Sensitivity

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Abstract

A highly sensitive refractive index sensor with metal insulator metal configuration has been proposed and numerically investigated the performance parameters. The sensor composed of a straight waveguide coupled with a ring-type regular pentagonal resonator. The maximum sensitivity observed is as high as 2325 nm/RIU with a figure of merit of 46. The sensor has been analyzed for the dielectrics whose refractive indices are between 1 to 1.02 and 1.34 to 1.40 and achieved a sensing resolution of \(4.30 \times 10^{ - 6}\) RIU. High sensitivity and FOM of the sensor with close-packed configuration make it suitable candidate for lab-on-chip sensing applications, biosensors, and optical applications.

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Authors and Affiliations

  1. Department of Electrical and Electronic Engineering, Islamic University of Technology (IUT), Gazipur, 1704, Bangladesh

    Rabiul Al Mahmud, Md. Omar Faruque & Rakibul Hasan Sagor

Authors
  1. Rabiul Al Mahmud
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  2. Md. Omar Faruque
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  3. Rakibul Hasan Sagor
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Rabiul Al Mahmud and Md. Omar Faruque. The first draft of the manuscript was written by Rabiul Al Mahmud along with Rakibul Hasan Sagor. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Rabiul Al Mahmud.

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Al Mahmud, R., Faruque, M.O. & Sagor, R.H. Plasmonic Refractive Index Sensor Based on Ring-Type Pentagonal Resonator with High Sensitivity. Plasmonics 16, 873–880 (2021). https://doi.org/10.1007/s11468-020-01357-7

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  • DOI: https://doi.org/10.1007/s11468-020-01357-7

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