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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
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DOI：10.1007/s11468-026-03392-2.png)
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Abstract
En 中文
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.
Keywords:
Surface plasmon polaritons (SPPs)
Orbital angular momentum (OAM)
High-magneto-optical medium
Optical vortex control fields
Silver-silica nanocomposite
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