Graphene plasmon polaritons excited in individual and periodic nanoribbons microstructures have attracted enormous attention in plasmonics due to their complicated edge effect and excellent tunability. As the distance between neighboring graphene nanoribbons becomes small enough, the strong coupling between the plasmons in individual nanoribbons produces collective oscillations of surface plasmons in a graphene nanoribbons array, the dispersion of which behaves as phonons in a solid, that is, the phonon‐like plasmonic resonance mode. In this paper, such a phonon‐like plasmonic resonance is theoretically demonstrated in a finite number of graphene nanoribbons deposited on a silicon substrate. Based on the classical LC circuit model, an analytical dispersion relation is obtained to explain the simulated results. Furthermore, an electrically controlled plasmonic switch is proposed with a high performance based on the plasmonic phonon‐like resonance theory. The work provides the building blocks to construct graphene plasmonic circuits for future compact optoelectronic devices.

中文翻译：

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有限数量的石墨烯纳米带中的声子状等离子体共振

在单个和周期性的纳米带微结构中激发的石墨烯等离激元极化子因其复杂的边缘效应和出色的可调谐性而在等离激子学中引起了极大的关注。随着相邻石墨烯纳米带之间的距离变得足够小，各个纳米带中的等离激元之间的强耦合会在石墨烯纳米带阵列中产生表面等离激元的集体振荡，其分散体在固体中表现为声子，即像声子等离子体共振模式。在本文中，在有限数量的沉积在硅基板上的石墨烯纳米带上从理论上证明了这种类似于声子的等离子体共振。基于经典LC电路模型，获得解析色散关系来解释仿真结果。此外，基于类等离子体声子共振理论，提出了一种高性能的电控等离子体开关。这项工作为构建用于未来紧凑型光电器件的石墨烯等离激元电路提供了基础。