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arXiv 1402.6472physics.optics
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多层石墨烯波导

Multilayer graphene waveguides

Daria Smirnova, Ivan Iorsh, Ilya Shadrivov, Yuri Kivshar

摘要:

研究了多层石墨烯超材料引导TM偏振电磁波的色散特性。我们表明,色散和本地化的导模可以有效地控制通过改变结构中的层数。值得注意的是,我们发现,在长波长极限下,N层石墨烯结构的基模的色散与由单个石墨烯层支持的等离子体激元模式的色散一致,但具有N倍大的电导率。我们还比较了我们的精确色散关系提供的有效介质模型的结果。

英文摘要:

We study dispersion properties of TM-polarized electromagnetic waves guided by a multilayer graphene metamaterial. We demonstrate that both dispersion and localization of the guided modes can be efficiently controlled by changing the number of layers in the structure. Remarkably, we find that in the long wavelength limit, the dispersion of the fundamental mode of the N-layer graphene structure coincides with the dispersion of a plasmon mode supported by a single graphene layer, but with N times larger conductivity. We also compare our exact dispersion relations with the results provided by the effective media model.

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