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Abstract <p>In the present work, the influence of the surface quantum effect on the field intensity of a nanoparticle pair with a nanometre-scale gap is investigated. Gold and sodium are chosen as the particle materials. The quantum effect is taken into account using mesoscopic boundary conditions involving the Feibelman parameters. The modelling was carried out using the discrete sources method, which allows the near fields to be computed with guaranteed accuracy. As a result of comparative analysis, significant differences in the field intensity within the nanometre-scale gap between gold and sodium particles were identified. It was established that, when the quantum effect is taken into account, the field intensity in the gap between sodium particles turns out to be higher than in the classical case. This markedly distinguishes them from the gold pair, where accounting for the quantum effect leads to a reduction in intensity.</p>

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Anomalous Behaviour of Gap Intensity in Paired Alkali Metal Nanoparticles with Mesoscopic Boundary Conditions

  • 期刊论文

  • 发表日期：

    2025年8月1日

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

摘要

Abstract

In the present work, the influence of the surface quantum effect on the field intensity of a nanoparticle pair with a nanometre-scale gap is investigated. Gold and sodium are chosen as the particle materials. The quantum effect is taken into account using mesoscopic boundary conditions involving the Feibelman parameters. The modelling was carried out using the discrete sources method, which allows the near fields to be computed with guaranteed accuracy. As a result of comparative analysis, significant differences in the field intensity within the nanometre-scale gap between gold and sodium particles were identified. It was established that, when the quantum effect is taken into account, the field intensity in the gap between sodium particles turns out to be higher than in the classical case. This markedly distinguishes them from the gold pair, where accounting for the quantum effect leads to a reduction in intensity.