We propose a simple quasi-continuous monolayer graphene structure and achieve a dynamically tunable triple plasmon-induced transparency (PIT) effect in the proposed structure. Additional analyses indicate that the proposed structure contains a self-constructed bright-dark-dark mode system. A uniform theoretical model is introduced to investigate the spectral response characteristics and slow light-effects in the proposed system, and the theoretical and the simulated results exhibit high consistency. In addition, the influences of the Fermi level and the carrier mobility of graphene on transmission spectra are discussed. It is found that each PIT window exhibits an independent dynamical adjustability owing to the quasi-continuity of the proposed structure. Finally, the slow-light effects are investigated based on the calculation of the group refractive index and phase shift. It is found that the structure displays excellent slow-light effects near the PIT windows with high-group indices, and the maximum group index of each PIT window exceeds 1000 when the carrier mobility of graphene increases to 3.5 m² V⁻¹ s⁻¹. The proposed structure has potential to be used in multichannel filters, optical switches, modulators, and slow light devices. Additionally, the established theoretical model lays a theoretical basis for research on multimode coupling effects.

中文翻译：

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准连续单层石墨烯结构中三等离激元引起的透明性和出色的慢光

我们提出了一种简单的准连续单层石墨烯结构，并在提出的结构中实现了动态可调的三等离子体激元诱导的透明性（PIT）效果。进一步的分析表明，所提出的结构包含一个自构造的明暗暗模式系统。引入了一个统一的理论模型来研究该系统的光谱响应特性和慢光效应，并且理论和仿真结果具有很高的一致性。此外，讨论了费米能级和石墨烯的载流子迁移率对透射光谱的影响。结果发现，由于拟议结构的准连续性，每个PIT窗口都具有独立的动态可调节性。最后，基于群折射率和相移的计算研究了慢光效应。发现该结构在具有高群指数的PIT窗口附近显示出优异的慢光效果，并且当石墨烯的载流子迁移率增加至3.5 m时，每个PIT窗口的最大群指数超过1000。² V ^-1 s ^-1。所提出的结构具有在多通道滤波器，光开关，调制器和慢光装置中使用的潜力。此外，所建立的理论模型为研究多模耦合效应奠定了理论基础。