This paper reports two design thoughts about nano-scale waveguides including parallel slot structure and vertical slot structure. According to the simulation results of different schemes, the design of parallel slot structure is demonstrated to exhibit better performance. Thus, we further explore its typical characteristics based on this scheme, such as electric field distribution, effective refractive index, non-linearity, dispersion and so on. Besides, we explore the properties of the waveguide under different thicknesses of the core material. On the other hand, combining with graphene layer applied to additional bias voltage, the tunable properties of the waveguide are realized. These results can provide significant reference for photoelectronic device field and lead to a deeper insight of the physical mechanisms of graphene-based waveguides.

中文翻译：

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纳米光子石墨烯基波导的理论研究

本文报道了关于纳米级波导的两种设计思想，包括平行槽结构和垂直槽结构。根据不同方案的仿真结果，证明了并行槽结构的设计表现出更好的性能。因此，我们在此方案的基础上进一步探索其典型特性，如电场分布、有效折射率、非线性、色散等。此外，我们探索了不同厚度核心材料下波导的特性。另一方面，结合施加额外偏置电压的石墨烯层，实现了波导的可调特性。这些结果可为光电器件领域提供重要参考，并有助于深入了解石墨烯基波导的物理机制。