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arXiv 1711.08367physics.optics
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漂移诱导的单向石墨烯等离子体

Drift-induced Unidirectional Graphene Plasmons

Tiago A. Morgado, Mário G. Silveirinha

摘要:

非互易光子器件实现了“单向”光流动,是光学系统的基本组成部分。在这里,我们研究了另一种范式,打破互易性,实现单向亚波长光传播完全兼容现代全光子高度集成系统。与最近的一些研究一致,我们的理论模型预测,用漂移电流偏置的石墨烯片具有很强的非互易可调响应。引人注目的是,我们发现,表面等离子体激元的传播可以有效地“单向”,并可能在很大程度上免疫缺陷和障碍物的后向散射。此外,漂移电流偏置可以将石墨烯等离子体激元的传播长度提高超过100%。我们的发现为非互易光子学开辟了新的进展,并提供了一个新的机会,用一个原子厚的非互易器件来控制光的流动。

英文摘要:

Nonreciprocal photonic devices enable "one-way" light flows and are essential building blocks of optical systems. Here, we investigate an alternative paradigm to break reciprocity and achieve unidirectional subwavelength light propagation fully compatible with modern all-photonic highly-integrated systems. In agreement with a few recent studies, our theoretical model predicts that a graphene sheet biased with a drift electric current has a strong nonreciprocal tunable response. Strikingly, we find that the propagation of the surface plasmon polaritons can be effectively "one-way" and may be largely immune to the backscattering from defects and obstacles. Furthermore, the drift-current biasing may boost the propagation length of the graphene plasmons by more than 100%. Our findings open new inroads in nonreciprocal photonics and offer a new opportunity to control the flow of light with one-atom thick nonreciprocal devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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