https://doi.org/10.1140/epjp/s13360-024-05694-y
Regular Article
Au topology-dependent performance investigation of surface plasmon resonance- based biosensor
1
Faculty of Physics, University of Tabriz, Tabriz, Iran
2
Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230031, Hefei, China
Received:
18
May
2024
Accepted:
30
September
2024
Published online:
13
October
2024
Currently, surface plasmon resonance (SPR) technology has drawn significant attention around the whole world, owing to its versatility in optical device applications. The concept of SPR depends on the optical properties of the metal layer and the dielectric medium. In this work, the effect of gold strip topology on the performance of the SPR biosensor is investigated. Five configurations with different Au-strip shapes are designed and explored numerically using COMSOL Multiphysics. The maximum sensitivities as 150, 150, 120 and 210 
are obtained for the single circular arc, half-ring, multi circular arc and nanowire embedded configurations, respectively. Our results show that sensitivity enhancement up to 75% is achievable via engineering the sensor gold-strip shape. The outstanding performance of the proposed biosensors will facilitate their integration into future biological detection applications.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
