Recent advances of optical fiber biosensors based on surface plasmon resonance: sensing principles, structures, and prospects

Lv, Jingwei; Wang, Jianxin; Yang, Lin; Liu, Wei; Fu, Haihao; Chu, Paul K.; Liu, Chao

doi:10.1039/d4sd00045e

Sens. Diagn.

2024

DOI: 10.1039/d4sd00045e

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Recent advances of optical fiber biosensors based on surface plasmon resonance: sensing principles, structures, and prospects

Jingwei Lv,

Jianxin Wang,

Lin Yang

et al.

Abstract: Optical fiber biosensors based on the surface plasmon resonance (SPR) phenomenon are generating increasing interest due to their capability of real-time monitoring of analytes in a biocompatible, label-free, stable, and...

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Cited by 2 publications

References 142 publications

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Transverse magnetic supermodes in plasmonic optical fibers excited by radially polarized light

Jind,

Berini

2024

Opt. Express

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The overlap integrals method, with a fully vectorial formulation, is used to model the selective excitation of the TM01 mode in a few-mode optical fiber with a radially polarized donut beam, and its coupling to guided modes having a plasmonic character (supermodes). The analyses were performed on a waveguide formed as a step-index few-mode optical fiber coated with a thin gold film, at an operating wavelength of 1310 nm. The waveguide was found to support modes having optical fiber, circular metallic waveguide, and surface plasmon characteristics, depending on geometrical and material parameters. Three purely bound transverse magnetic (radially polarized) supermodes were identified: Two symmetric, labeled sTM01 and sTM02 modes, and one asymmetric, labeled ab mode, where symmetry pertains to the transverse electric field distribution over the gold film. The effective mode indices of the supermodes were studied as a function of the thickness of the gold film and its proximity to the fiber core. Considerations for the selective excitation of the sTM01 mode are discussed along with its possible applications. The transmittance of the supermodes is found to be robust even at sharp waveguide transitions. The results predict that effective excitation of TM supermodes with strong plasmonic character, without significant coupling losses, can be achieved by exciting the fiber with a radially polarized donut beam.

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Transverse magnetic supermodes in plasmonic optical fibers excited by radially polarized light

Jind,

Berini

2024

Opt. Express

View full text Add to dashboard Cite

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The Tunable Parameters of Graphene-Based Biosensors

Tene,

Svozilík,

Colcha

et al. 2024

Sensors

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Graphene-based surface plasmon resonance (SPR) biosensors have emerged as a promising technology for the highly sensitive and accurate detection of biomolecules. This study presents a comprehensive theoretical analysis of graphene-based SPR biosensors, focusing on configurations with single and bimetallic metallic layers. In this study, we investigated the impact of various metallic substrates, including gold and silver, and the number of graphene layers on key performance metrics: sensitivity of detection, detection accuracy, and quality factor. Our findings reveal that configurations with graphene first supported on gold exhibit superior performance, with sensitivity of detection enhancements up to 30% for ten graphene layers. In contrast, silver-supported configurations, while demonstrating high sensitivity, face challenges in maintaining detection accuracy. Additionally, reducing the thickness of metallic layers by 30% optimizes light coupling and enhances sensor performance. These insights highlight the significant potential of graphene-based SPR biosensors in achieving high sensitivity of detection and reliability, paving the way for their application in diverse biosensing technologies. Our findings pretend to motivate future research focusing on optimizing metallic layer thickness, improving the stability of silver-supported configurations, and experimentally validating the theoretical findings to further advance the development of high-performance SPR biosensors.

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Recent advances of optical fiber biosensors based on surface plasmon resonance: sensing principles, structures, and prospects

Abstract: Optical fiber biosensors based on the surface plasmon resonance (SPR) phenomenon are generating increasing interest due to their capability of real-time monitoring of analytes in a biocompatible, label-free, stable, and...

Cited by 2 publications

References 142 publications

Transverse magnetic supermodes in plasmonic optical fibers excited by radially polarized light

Transverse magnetic supermodes in plasmonic optical fibers excited by radially polarized light

The Tunable Parameters of Graphene-Based Biosensors

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