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<p>Over the last few decades, the process of sensing biological activities with the help of surface plasmon resonance has captivated the scientific communities. This scholarly article articulates the introduction of an innovative graphene metasurface biosensor (GMB), which has been meticulously engineered to flawlessly incorporate all of the aforementioned critical elements into a cohesive framework. Unlike conventional hybrid designs that typically exhibit complexity, the GMB distinguishes itself by utilizing a graphene layer characterized by a straightforward yet effective architectural configuration, which enhances its functional capabilities. The results derived from FDTD simulations compellingly demonstrate that can be effectively harnessed to facilitate the achievement of an extensive broadband absorption spectrum, specifically at wavelengths of 542.12 nm, 649.55 nm, and 838.77 nm. Furthermore, the GMB exhibits the realization of broadband absorption capabilities that consistently exceed 90% across a spectrum of incident angles ranging from 0 to 30<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11468_2025_3090_Article_IEq1.gif" Format="GIF" Height="7" Rendition="HTML" Resolution="72" Type="Linedraw" Width="9" /> </InlineMediaObject> <EquationSource Format="TEX">\( {}^{\circ } \)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mo>∘</mo> </mmultiscripts> </math></EquationSource> </InlineEquation> (Celsius). Moreover, the capacity to modify the chemical potential of graphene serves as a pivotal mechanism through which one can effectively alter the effective absorption bandwidth, a process that can be conveniently achieved by the application of external voltage, thus providing a level of tuning flexibility. The enhancements observed remarkable improvements, specifically reaching levels of up to 141% for the FDTD.</p>

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Fabrication Friendly NIR-II Plasmonics Hybrid Graphene Metasurfaces Biosensor: A 3D-FDTD Study

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Ali Farmani,
  • Fatemeh Moradiani

摘要

Over the last few decades, the process of sensing biological activities with the help of surface plasmon resonance has captivated the scientific communities. This scholarly article articulates the introduction of an innovative graphene metasurface biosensor (GMB), which has been meticulously engineered to flawlessly incorporate all of the aforementioned critical elements into a cohesive framework. Unlike conventional hybrid designs that typically exhibit complexity, the GMB distinguishes itself by utilizing a graphene layer characterized by a straightforward yet effective architectural configuration, which enhances its functional capabilities. The results derived from FDTD simulations compellingly demonstrate that can be effectively harnessed to facilitate the achievement of an extensive broadband absorption spectrum, specifically at wavelengths of 542.12 nm, 649.55 nm, and 838.77 nm. Furthermore, the GMB exhibits the realization of broadband absorption capabilities that consistently exceed 90% across a spectrum of incident angles ranging from 0 to 30 \( {}^{\circ } \) ∘ (Celsius). Moreover, the capacity to modify the chemical potential of graphene serves as a pivotal mechanism through which one can effectively alter the effective absorption bandwidth, a process that can be conveniently achieved by the application of external voltage, thus providing a level of tuning flexibility. The enhancements observed remarkable improvements, specifically reaching levels of up to 141% for the FDTD.