Design Of C-type Ring Metasurface And Analysis Of SPPs Phase Modulation Capability

In recent years,Surface Plasmon Photonics(SPPS)has become a hot subject in the field of science and technology.Metasurface derived from surface plasmons have attracted much attention due to their good surface wave confinement and enhanced light field effect.Therefore,the design of new metasurface to realize directional excitation and phase modulation of SPPs is a hot topic in the field of nanophotonics and plasma,and also the most extreme challenge.Polarization-phase interactions at the nanoscale produce many unique effects that are weak or absent in conventional optics.These effects make possible a variety of applications in physics,nanooptics,and materials science.This article through to the surface from the theoretical development of excimer and principle,analyzes the frontier at over the surface of the working principle and practical philosophy,on the basis of existing theory put forward a kind of CR(C-type Ring)type metasurface,analysis the feasibility of this CR type slot design,comparing the traditional v-shaped structure based metasurface design,The principle of improving the excitation efficiency of CR type metasurface is analyzed,and the phase modulation ability of CR type metasurface is discussed.The various advantages of this new type metasurface are verified by simulation experiments.Based on the design of CR type metasurface,this paper also innovatively proposed a method of periodically etching grating array on one side of CR type slits to increase the intensity of SPPS propagated to the other side through Bragg reflection,which greatly enhanced the excitation efficiency of SPPS compared with the traditional metasurface structure.Moreover,it still has the phase modulation ability of directional excitation.In this paper,the feasibility of grating etching method is analyzed,the influence of various parameters of grating on excitation efficiency is studied,and the influence of grating on phase modulation ability is verified under different setting conditions.This grating coupled CR type metasurface provides new possibilities and great creativity for super resolution imaging,light holography,abnormal reflection and refraction,and optical information processing.