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<p>In this work, we theoretically investigate the coherent control of wavelength-interrogation of sensitivity of surface plasmon polaritons (SPPs) at the interface of a silver-silica nanocomposite and a ferromagnetic magnomechanical system using grating coupling geometry. The proposed hybrid system contains of a yttrium iron garnet (YIG) sphere embedded in a microwave cavity where photon, magnon, and phonon modes interact through magnon-photon and magnomechanical couplings. The wavelength interrogation of sensitivity of SPPs is derived and studied under the influence of several key parameters, including probe detuning (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\sigma \)</EquationSource> </InlineEquation>), microwave input power (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(P_{in}\)</EquationSource> </InlineEquation>), photon-magnon coupling strength (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\Gamma \)</EquationSource> </InlineEquation>), diffraction order (<i>m</i>), and grating period (<i>P</i>). According to the findings, the sensitivity grows away from the resonance detuning <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\sigma \)</EquationSource> </InlineEquation>, whereas stronger photon-magnon coupling <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(\Gamma \)</EquationSource> </InlineEquation> and higher microwave input power <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(P_{in}\)</EquationSource> </InlineEquation> tend to suppress the sensitivity. However, the plasmonic response is significantly enhanced with lower diffraction orders <i>m</i> and higher grating periods <i>P</i>. The highest observed wavelength-modulated sensitivity is <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(850\,\mathrm {nm/RIU}\)</EquationSource> </InlineEquation>. These results offer a tunable platform of plasmonic sensing for biological diagnostics, chemical detection, and environmental monitoring.</p>

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Coherent Control of Wavelength Interrogation of Sensitivity of Surface Plasmon Polaritons at the Interface of Silver and Magnomechanical System using Grating Geometry

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Zareen A. Khan,
  • Abdul Majeed,
  • Amir Ali,
  • Zeeshan Ali

摘要

In this work, we theoretically investigate the coherent control of wavelength-interrogation of sensitivity of surface plasmon polaritons (SPPs) at the interface of a silver-silica nanocomposite and a ferromagnetic magnomechanical system using grating coupling geometry. The proposed hybrid system contains of a yttrium iron garnet (YIG) sphere embedded in a microwave cavity where photon, magnon, and phonon modes interact through magnon-photon and magnomechanical couplings. The wavelength interrogation of sensitivity of SPPs is derived and studied under the influence of several key parameters, including probe detuning ( \(\sigma \) ), microwave input power ( \(P_{in}\) ), photon-magnon coupling strength ( \(\Gamma \) ), diffraction order (m), and grating period (P). According to the findings, the sensitivity grows away from the resonance detuning \(\sigma \) , whereas stronger photon-magnon coupling \(\Gamma \) and higher microwave input power \(P_{in}\) tend to suppress the sensitivity. However, the plasmonic response is significantly enhanced with lower diffraction orders m and higher grating periods P. The highest observed wavelength-modulated sensitivity is \(850\,\mathrm {nm/RIU}\) . These results offer a tunable platform of plasmonic sensing for biological diagnostics, chemical detection, and environmental monitoring.