The performance of the composite metal/dielectric multilayered L-shaped nanoantennas for strong electric field enhancement has been investigated. The bonding and antibonding modes arising from the plasmon hybridization modes of the multilayered nanoantennas are presented. It is observed that the plasmon coupling of the proposed composite nanostructures can form three states of in-phase bonding, out-of-phase bonding and out-of-phase antibonding. The out-of-phase charge distribution indicates that dark plasmon modes can be revealed on the bonding modes of the proposed multilayered structures. The response of the proposed L-shaped nanoantennas to the attachment of a dielectric spherical nanoparticle and their molecular sensitivity are investigated. According to this study, the proposed multilayered nanostructures are good candidates for strong electric field localization in sensing and detection applications.

中文翻译：

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具有增强的电场增强能力的多层L形纳米天线阵列

研究了复合金属/介电多层L形纳米天线在增强电场方面的性能。提出了由多层纳米天线的等离激元杂交模式引起的键合和反键合模式。观察到，所提出的复合纳米结构的等离子体耦合可以形成同相键合，异相键合和异相反键合的三种状态。异相电荷分布表明，在提出的多层结构的键合模式上可以显示暗等离子体激元模式。研究了拟议的L形纳米天线对球形球形纳米粒子附着的响应及其分子敏感性。根据这项研究，