Graphene-based plasmonic modulator on a groove-structured metasurface
Graphene-based plasmonic modulator on a groove-structured metasurface
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DOI：
10.1364/ol.42.002247
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发表时间：
2017-06-15
期刊：
影响因子：
3.6
通讯作者：
Zhu, Shining
中科院分区：
文献类型：
--
作者：
Wang, Yulin;Li, Tao;Zhu, Shining
石墨烯具有优异的导电性，在光电集成电路中具有提供高效调制的巨大潜力，并且已经证明了几种基于石墨烯的光子调制器。在这篇论文中，提出了一种基于单层石墨烯片覆盖的沟槽结构超表面的等离子调制器，其中容纳了横向类电模式。我们的设计利用了等离子体模式的场增强，克服了自由表面等离子体的电场与石墨烯平面之间的方向不匹配。因此，与传统的等离子体调制器相比，石墨烯基等离子体调制器的调制深度大大提高。我们的理论结果还表明，该调制器可以在可接受的插入损耗下在宽带中工作，这表明了在纳米光子集成中的可能应用。(C) 2017年美国光学学会
Graphene holds great potential to provide efficient modulation in optoelectronic integrated circuits due to its excellent tunability in conductivity, and several types of graphene-based photonic modulators have already been demonstrated. In this Letter, a plasmonic modulator was proposed based on a groove-structured metasurface covered by a single-layer graphene sheet, in which a transverse electrical-like mode is accommodated. Our design takes advantage of the field enhancement of the plasmonic mode and overcomes the orientation mismatch between the electrical field of the free surface plasmons and the graphene plane. Therefore, this graphene-based plasmonic modulator exhibits a greatly improved modulation depth, compared with the conventional plasmonic ones. Our theoretical results also show that this modulator can work in a broad-band with acceptable insertion loss, indicating possible applications in nanophotonic integrations. (C) 2017 Optical Society of America