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<p>The propagation of surface plasmon polariton (SPP) waves is coherently manipulated at the interface between a five-level high-magneto-optical medium and a silver-silica nanocomposite material using driven optical vortex control fields. The optical response of the high-magneto-optical medium is analyzed using density matrix formalism, where the optical vortex fields are introduced through spatially dependent Rabi frequencies. The real part of the SSP dispersion relation <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(Re(k_{sp})\)</EquationSource> </InlineEquation> is controlled in the range <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(1.765k_0\le Re(k_{sp}(x,y))\le 1.925k_0\)</EquationSource> </InlineEquation>, exhibiting helical distributions of maxima and minima in the spatial region <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(-2\lambda \le x,y\le 2\lambda \)</EquationSource> </InlineEquation>. The damping spectrum of the SPP varies in the range of <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(0.120k_0\le Im(k_{sp}(x,y))\le 0.275k_0\)</EquationSource> </InlineEquation>, also showing a vortex-dependent spatial distribution. The group index varies in the range of <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(365\le n^{sp}_g(x,y)\le 537\)</EquationSource> </InlineEquation>, while the corresponding group velocity varies in the range of <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(5.3\times 10^5m/s\le v^{sp}_g(x,y)\le 7.7\times 10^5m/s\)</EquationSource> </InlineEquation>. The number of maxima and minima increases with increasing orbital angular momentum (OAM) of the optical vortex control fields for <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(\ell =1,2,3,4\)</EquationSource> </InlineEquation>. The modified results of our manuscript is useful for biosensing, photovoltaic devices and, advanced sensor technology.</p>

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Coherent Control of Vortex Plasmon Polariton Waves at the Interface of a Five-Level High-Magneto-Optical Medium and Silver-Silica Nanocomposite Material

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Shehzad Khan,
  • Laila A. AL-Essa,
  • Mati ur Rahman,
  • Nawal H. Siddig

摘要

The propagation of surface plasmon polariton (SPP) waves is coherently manipulated at the interface between a five-level high-magneto-optical medium and a silver-silica nanocomposite material using driven optical vortex control fields. The optical response of the high-magneto-optical medium is analyzed using density matrix formalism, where the optical vortex fields are introduced through spatially dependent Rabi frequencies. The real part of the SSP dispersion relation \(Re(k_{sp})\) is controlled in the range \(1.765k_0\le Re(k_{sp}(x,y))\le 1.925k_0\) , exhibiting helical distributions of maxima and minima in the spatial region \(-2\lambda \le x,y\le 2\lambda \) . The damping spectrum of the SPP varies in the range of \(0.120k_0\le Im(k_{sp}(x,y))\le 0.275k_0\) , also showing a vortex-dependent spatial distribution. The group index varies in the range of \(365\le n^{sp}_g(x,y)\le 537\) , while the corresponding group velocity varies in the range of \(5.3\times 10^5m/s\le v^{sp}_g(x,y)\le 7.7\times 10^5m/s\) . The number of maxima and minima increases with increasing orbital angular momentum (OAM) of the optical vortex control fields for \(\ell =1,2,3,4\) . The modified results of our manuscript is useful for biosensing, photovoltaic devices and, advanced sensor technology.