论文标题
在一维石墨烯的光子晶体中，电流诱导的非交流和无折射的传播
Current-induced nonreciprocity and refraction-free propagation in a one-dimensional graphene-based photonic crystal
论文作者
论文摘要
非肾脏光子设备在调节电磁波的传播中起着重要作用。在这里，我们从理论上研究了经受施加的电气直流偏置的一维光子光子晶体中横向磁模式的非偏置特性。我们发现，由外部直流电场驱动的漂流电子会产生极不对称的分散图。此外，当漂流电子与入射波矢量的正常成分的反平行线行进时，负折射会被强烈抑制，从而导致光能沿直接电流的方向流动。我们的理论发现可用于设计非核心纳米光子设备，并使光传播而无需折射。
Nonreciprocal photonic devices play a significant role in regulating the propagation of electromagnetic waves. Here we theoretically investigate the nonreciprocal properties of transverse magnetic modes in a one-dimensional graphene-based photonic crystal subjected to an applied electrical DC bias. We find that drifting electrons driven by the external DC electric field can give rise to extremely asymmetric dispersion diagrams. Furthermore, when the drifting electrons travel antiparallel to the normal component of the incident wave vector, the negative refraction is strongly suppressed, causing the energy of light to flow along the direction of the direct electric current. Our theoretical findings can be used to design nonreciprocal nanophotonic devices and enable light to propagate without refraction.
