The conductivity of graphene, due to interband electron transitions, is evaluated, in this article, as rational functions through an efficient iterative optimization of Padé polynomials. Then, the latter are straightforwardly imported in the text finite-difference text time-domain algorithm, as an equivalent surface current, by means of precise recursive convolution schemes. Numerical examples, considering an incident plane wave toward graphene, the extraction of the corresponding surface wave propagation attributes, and a plasmonic switch, successfully validate the consistent modeling of interband conductivity through the proposed technique.

中文翻译：

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石墨烯带间贡献的精确FDTD建模的一致方案

本文通过带电电子跃迁对石墨烯的电导率进行了评估，通过对Padé多项式进行有效的迭代优化，将其作为有理函数。然后，通过精确的递归卷积方案将后者作为等效表面电流直接导入到文本有限差分文本时域算法中。数值实例，考虑了入射到石墨烯的平面波，提取了相应的表面波传播属性，以及等离激元开关，通过所提出的技术成功验证了带间电导率的一致建模。