We theoretically propose a dual-channel bistable switch based on a monolayer Z-shaped graphene nanoribbon nanoresonator (NR) coupled to a metal nanoparticle (MNP). We show that the bistable nonlinear absorption response can be realized due to a competition and combination of the exciton-plasmon and exciton-phonon interactions. We map out two-dimensional and three-dimensional bistability phase diagrams, which reveal clearly the dynamical evolution of the roles played by these two interactions in managing optical bistability (OB) at all stages. Specifically, the bistable switch proposed can be controlled via a single channel or dual channels by only adjusting the intensity or frequency of the pump field. In/outside these channels, the switch will be turned on/off. The results obtained here not only can be employed to measure precisely the distance between the MNP and the NR but also provide promising applications in optical switching and optical storage.

中文翻译：

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基于耦合到金属纳米粒子的单层石墨烯纳米带纳米谐振器的双通道双稳态开关。

我们从理论上提出了一种双通道双稳态开关，该开关基于耦合到金属纳米颗粒（MNP）的单层Z形石墨烯纳米带纳米谐振器（NR）。我们表明，由于激子-等离子体激元和激子-声子相互作用的竞争和结合，可以实现双稳态非线性吸收响应。我们绘制了二维和三维双稳态相图，这些图清楚地揭示了这两个相互作用在管理光学双稳态（OB）各个阶段中所扮演的角色的动态演变。具体而言，仅通过调节泵浦场的强度或频率，可以经由单通道或双通道来控制所提出的双稳态开关。在这些通道的内部/外部，开关将打开/关闭。