非对称介质环境下深亚波长结构表面波的高效激发

数值模拟了单亚波长狭缝结构在透射方介电常数εd增大时界面上表面波的激发效率。通过调整结构参数和介电常数,表面波的激发效率可以提高近40倍。表面波包括表面等离子体激元波(SPP波)和准柱面波(QCW波)。在不同的缝宽和介电常数条件下,它们对总的表面波激发效率的贡献不同。在近红外波段高介电常数环境下的高激发效率主要归因于SPP波的高效激发。该结构简单易于加工,对于纳米光子器件的制备和应用具有重要作用。

Excitation of Propagating Plasmons in Semi-Infinite Graphene Layer by Free Space Photons

By investigating the diffraction of plane waves by a semi-infinite solution for propagating surface plasmons in graphene, which can be excited graphene edge. The theoretical results are confirmed by numerical simulations. excite propagating surface plasmons in graphene where the graphene edge plays graphene layer, we present a rigorous by incident plane waves through the Our results reveal a convenient way to an important role.