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arXiv 1602.01466physics.optics
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石墨烯基超广角可调谐超材料吸收体

Graphene-based extremely wide-angle tunable metamaterial absorber

Jacob Linder, Klaus Halterman

摘要:

我们研究了基于石墨烯的各向异性超材料结构的吸收特性,其中超材料层具有对应于近零介电常数的电磁响应。我们发现,通过分析和数值研究,近完美的吸收出现在一个异常广泛的光束入射角。由于石墨烯的存在,吸收可通过栅极电压调节,从而提供能量传输的动态控制。我们发现,这种强烈增强的吸收是由于光与沿石墨烯/超材料混合物传播的快速波模之间的耦合而产生的。

英文摘要:

We investigate the absorption properties of graphene-based anisotropic metamaterial structures where the metamaterial layer possesses an electromagnetic response corresponding to a near-zero permittivity. We find that through analytical and numerical studies, near perfect absorption arises over an unusually broad range of beam incidence angles. Due to the presence of graphene, the absorption is tunable via a gate voltage, providing dynamic control of the energy transmission. We show that this strongly enhanced absorption arises due to a coupling between light and a fast wave-mode propagating along the graphene/metamaterial hybrid.

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