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Abstract <p>The discrete sources method is generalized to the case of analyzing the optical characteristics of layered nanoparticles taking into account the quantum effect in the plasmonic core based on mesoscopic boundary conditions with Feibelman parameters. The problem of diffraction of a plane wave by prolate spheroidal layered nanoparticles consisting of a gold core and a dielectric coating is simulated. It was found that taking into account the quantum effect leads to a decrease in the amplitude of the plasmonic resonance (damping) and to its shift toward shorter wavelengths (blue shift) by 10–12&#xa0;nm. It was also found that the plasmonic resonance can be shifted to the region of transparency of biological tissues by varying the elongation of the spheroid. A comparative analysis of homogeneous and layered particles made it possible to establish that coating leads to a decrease in the influence of the quantum effect on the level of energy absorption by the layered nanoparticle.</p>

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Discrete Sources Method for Studying the Influence of Quantum Effects on Optical Characteristics of Coated Plasmonic Nanoparticles

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • Yu. A. Eremin,
  • V. V. Lopushenko

摘要

Abstract

The discrete sources method is generalized to the case of analyzing the optical characteristics of layered nanoparticles taking into account the quantum effect in the plasmonic core based on mesoscopic boundary conditions with Feibelman parameters. The problem of diffraction of a plane wave by prolate spheroidal layered nanoparticles consisting of a gold core and a dielectric coating is simulated. It was found that taking into account the quantum effect leads to a decrease in the amplitude of the plasmonic resonance (damping) and to its shift toward shorter wavelengths (blue shift) by 10–12 nm. It was also found that the plasmonic resonance can be shifted to the region of transparency of biological tissues by varying the elongation of the spheroid. A comparative analysis of homogeneous and layered particles made it possible to establish that coating leads to a decrease in the influence of the quantum effect on the level of energy absorption by the layered nanoparticle.