Bezus Evgeni A, Doskolovich Leonid L, Soifer Victor A
Opt Lett. 2015 Nov 1;40(21):4935-8. doi: 10.1364/OL.40.004935.
In this Letter, we study numerically diffraction gratings for surface plasmon polaritons. Investigated plasmonic gratings consist of a periodic set of dielectric ridges located on the metal surface. The grating period is comparable with the wavelength of the incident wave. The simulation results obtained within the rigorous coupled-wave analysis framework have shown that the SPP diffraction on a plasmonic grating with parasitic scattering suppression is remarkably close to the diffraction of a TE-polarized plane wave on a conventional grating. A compact and efficient reflecting plasmonic grating is considered as an example. The presented results can be used for the design of high-efficiency two-dimensional optical elements for steering surface plasmon propagation.
在本信函中，我们对表面等离激元极化激元的衍射光栅进行了数值研究。所研究的等离子体光栅由位于金属表面的一组周期性电介质脊组成。光栅周期与入射波波长相当。在严格耦合波分析框架内获得的模拟结果表明，具有寄生散射抑制功能的等离子体光栅上的表面等离激元极化激元衍射与传统光栅上TE偏振平面波的衍射非常接近。以一种紧凑高效的反射等离子体光栅为例进行了研究。所呈现的结果可用于设计用于控制表面等离激元传播的高效二维光学元件。
