Propagating and Localized Graphene Surface Plasmon Polaritons on a Grating Structure
Propagating and Localized Graphene Surface Plasmon Polaritons on a Grating Structure
复制标题
DOI：
10.1109/jstqe.2016.2596262
复制
发表时间：
2017
影响因子：
4.9
通讯作者：
I. Lin;Chunru Fan;Jia-Ming Liu
中科院分区：
文献类型：
--
作者：
I. Lin;Chunru Fan;Jia-Ming Liu
研究了光栅结构上石墨烯表面等离子体激元（SPP）模的一般色散特性。结果表明，光栅差距的大小对激发的SPP模的色散有很大的影响。对于这种复杂的光栅系统，SPP模式的色散可以通过使用光子晶体模型来很好地近似，因此，不需要进行完整的模拟。对于大的间隙尺寸，SPP模式的色散可以通过将光栅结构视为一系列法布里-珀罗腔来发现，这一事实表明传播的等离子体激元在差距边缘处的强反射;当差距小时，与传播的SPP相比，激发的SPP模式变得高度局部化。
The general dispersion characteristics of the surface plasmon polariton (SPP) modes for graphene on a grating structure are studied. It is shown that the dispersion of the excited SPP modes highly depends on the size of the gap of the grating. The dispersion of the SPP modes for such a complex grating system can be well approximated by using the photonic crystal model, and therefore, a full simulation is not needed. The fact that for a large gap size the dispersion of the SPP modes can be found by regarding the grating structure as a series of Fabry-Pérot cavities suggest strong reflection of propagating plasmons at the gap edges; the excited SPP modes become highly localized in contrast to the propagating SPPs when the gap is small.