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Design and Optimization of a Hybrid Plasmonic Sensor Based on Microring Resonators for Refractive Index Sensing.

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Title: Design and Optimization of a Hybrid Plasmonic Sensor Based on Microring Resonators for Refractive Index Sensing.
Authors: Dehghan, Mostafa1 (AUTHOR), Mohammadnezhad, Mohammadbagher1 (AUTHOR), Hassanzadeh, Abdollah1 (AUTHOR) a.hassanzadeh@uok.ac.ir
Source: Plasmonics. May2025, Vol. 20 Issue 5, p2997-3005. 9p.
Subjects: Optical resonators, Surface plasmon resonance, Physical sciences, Quality factor, Finite element method, Refractive index
Abstract: Hybrid plasmonic structures offer a promising platform for highly sensitive and compact optical sensing applications. In this paper, we propose and optimize a simple but powerful hybrid plasmonic refractive index sensor that combines a silicon microring resonator with gold plasmonic structures to achieve high quality factor and low loss. Light coupling into the ring resonator is obtained through a dielectric waveguide via evanescent field coupling. Numerical simulations of the proposed structure are performed using finite element method (FEM) implemented in COMSOL Multiphysics (wave optics module). Through numerical simulations, the structural parameters of the sensor are systematically optimized to obtain the optimal performance. The optimized design achieves a relatively high sensitivity of 36 nm/RIU, with an ultra-high quality factor (Q) of 5.626 × 103 and an excellent figure of merit (FoM) of 131. The high Q factor of the proposed sensor indicates a better limit of detection (LOD) and improved signal-to-noise ratio (SNR), making it suitable for high-precision applications. We believe this hybrid sensor demonstrates significant potential for applications in industrial and biomedical sensing due to its simple geometry, high precision, and efficient operation. [ABSTRACT FROM AUTHOR]
Copyright of Plasmonics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="DE" term="%22Optical+resonators%22">Optical resonators</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+plasmon+resonance%22">Surface plasmon resonance</searchLink><br /><searchLink fieldCode="DE" term="%22Physical+sciences%22">Physical sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Quality+factor%22">Quality factor</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Refractive+index%22">Refractive index</searchLink>
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  Data: Hybrid plasmonic structures offer a promising platform for highly sensitive and compact optical sensing applications. In this paper, we propose and optimize a simple but powerful hybrid plasmonic refractive index sensor that combines a silicon microring resonator with gold plasmonic structures to achieve high quality factor and low loss. Light coupling into the ring resonator is obtained through a dielectric waveguide via evanescent field coupling. Numerical simulations of the proposed structure are performed using finite element method (FEM) implemented in COMSOL Multiphysics (wave optics module). Through numerical simulations, the structural parameters of the sensor are systematically optimized to obtain the optimal performance. The optimized design achieves a relatively high sensitivity of 36 nm/RIU, with an ultra-high quality factor (Q) of 5.626 × 103 and an excellent figure of merit (FoM) of 131. The high Q factor of the proposed sensor indicates a better limit of detection (LOD) and improved signal-to-noise ratio (SNR), making it suitable for high-precision applications. We believe this hybrid sensor demonstrates significant potential for applications in industrial and biomedical sensing due to its simple geometry, high precision, and efficient operation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Plasmonics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11468-025-02944-2
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        Text: English
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      – SubjectFull: Surface plasmon resonance
        Type: general
      – SubjectFull: Physical sciences
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      – SubjectFull: Quality factor
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      – SubjectFull: Finite element method
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      – SubjectFull: Refractive index
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      – TitleFull: Design and Optimization of a Hybrid Plasmonic Sensor Based on Microring Resonators for Refractive Index Sensing.
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            – D: 01
              M: 05
              Text: May2025
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