arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.01966physics.opticscond-mat.mes-hall
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亚波长纳米狭缝阵列模式与金属-绝缘体-石墨烯腔模式之间的耦合:一个半解析模型

Coupling between subwavelength nano-slits lattice modes and metal-insulator-graphene cavity modes: A semi-analytical model

Kofi Edee, Maha Benrhouma, Mauro Antezza, Jonathan Albert Fan, Brahim Guizal

AI总结:

本文针对沉积在绝缘体/石墨烯层上的一维周期性亚波长狭缝阵列混合系统,提出一种基于弱耦合与强耦合相互作用的半解析模型,用以高效解释和获取其完整光谱响应。

摘要:

我们提出了一个半解析模型,用于描述由沉积在绝缘体/石墨烯层上的一维周期性亚波长狭缝阵列构成的混合系统中出现的共振现象。我们表明,该混合系统的光谱响应可以通过一个基于两个基本子系统之间弱耦合和强耦合的简单半解析模型得到完整解释。第一个基本子系统由一维周期性亚波长狭缝阵列组成,可将其视为均匀介质。在该介质中存在一种金属-绝缘体-金属阵列模式,它与表面等离子体模式和腔等离子体模式相互作用。与穿孔金属膜两个面上的表面等离子体模式的弱耦合导致宽带光谱,而该第一个子系统与由石墨烯-绝缘体-金属间隙构成的第二个子系统之间的强耦合则导致窄带光谱。我们提供了一个基于这两种相互作用的半解析模型,能够高效地获得该混合系统的完整光谱。

英文摘要:

We present a semi-analytical model of the resonance phenomena occurring in a hybrid system made of a 1D array of periodic subwavelength slits deposited on an insulator/graphene layer. We show that the spectral response of this hybrid system can be fully explained by a simple semi-analytical model based on a weak and strong couplings between two elementary sub-systems. The first elementary sub-system consists of a 1D array of periodic subwavelength slits viewed as a homogeneous medium. In this medium lives a metal-insulator-metal lattice mode interacting with surface and cavity plasmon modes. A weak coupling with surface plasmon modes on both faces of the perforated metal film leads to a broadband spectrum while a strong coupling between this first sub-system and a second one made of a graphene-insulator-metal gap leads to a narrow band spectrum. We provide a semi-analytical model based on these two interactions allowing to efficiently access the full spectrum of the hybrid system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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