Efficient manipulation of surface plasmon polariton waves in graphene
Efficient manipulation of surface plasmon polariton waves in graphene
复制标题
DOI：
10.1063/1.4729557
复制
发表时间：
2012-06
影响因子：
4
通讯作者：
H. Xu;Wei-Bing Lu;Wei Zhu;Z. Dong;T. Cui
中科院分区：
文献类型：
--
作者：
H. Xu;Wei-Bing Lu;Wei Zhu;Z. Dong;T. Cui
表面等离子体激元（SPP）波的传播可以通过静电门控和/或化学掺杂通过可调石墨烯电导率来控制。在这里，我们提出了一种通过设计石墨烯上介电包层的厚度来有效操纵 SPP 波的替代方法。同时，通过设计包层的拓扑结构，可以逐渐改变SPP波特性，而不是突然改变。与传统方法相比，该方法加工更方便，散射损耗更低。利用这种方法实现了等离激元吕讷堡透镜，这为实现平面等离激元器件开辟了一条有用的途径。
The propagation of surface plasmon polariton (SPP) wave can be controlled by tunable graphene conductivity via electrostatic gating and/or chemical doping. Here, we propose an alternative way to manipulate the SPP waves efficiently by designing the thickness of dielectric cladding on the graphene. Meanwhile, the SPP wave properties can be changed gradually rather than abruptly through designing the topology of cladding. Compared to the traditional method, the proposed approach is more convenient for machining with lower scattering loss. A plasmonic Luneburg lens has been realized using this method, which opens a useful way to achieve the planar plasmonic devices.