Investigation on Surface Plasmon Polaritons and Localized Surface Plasmon Production Mechanism in Micro-Nano Structures  

作　　者：Ling-Xi Hu Min Hu Sheng-Gang Liu 

机构地区：[1]Terahertz Research Center,School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054 [2]Key Laboratory of Terahertz Technology(Ministry of Education),University of Electronic Science and Technology of China,Chengdu 610054

出　　处：《Journal of Electronic Science and Technology》2022年第1期20-29,共10页电子科技学刊（英文版）

基　　金：supported by the National Key Research and Development Program of China under Grants No.2017YFA0701000,No.2018YFF01013001,and No.2020YFA0714001;the Natural Science Foundation of China under Grants No.61988102,No.61921002,and No.62071108。

摘　　要：The simulation mechanism of surface plasmon polaritons(SPPs)and localized surface plasmon(LSP)in different structures was studied,including the Au reflection grating(Au grating),Au substrate with dielectric ribbons grating(Au substrate grating),and pure electric conductor(PEC)substrate with Au ribbons grating(Au ribbons grating).And the characteristics of the Smith-Purcell radiation in these structures were presented.Simulation results show that SPPs are excited on the bottom surface of Au substrate grating grooves and LSP is stimulated on the upper surface both of Au ribbons grating grooves and Au grating grooves.Owing to the irreconcilable contradiction between optimizing the grating diffraction radiation efficiency and optimizing the SPPs excitation efficiency in the Au substrate grating,only 40-times enhancement of the radiation intensity was obtained by excited SPPs.However,the LSP enhanced structure overcomes the above problem and gains much better radiation enhancement ability,with about 200-times enhancement obtained in the Au ribbons grating and more than 500-times enhancement obtained in the Au grating.The results presented here provide a way of developing miniature,integratable,tunable,high-power-density radiation sources from visible light to ultraviolet rays at room temperature.

关 键 词：Coherent radiation high-power radiation localized surface plasmon(LSP) micro-nano structure Smith-Purcell radiation surface plasmon polaritons(SPPs) 

分 类 号：O53[理学—等离子体物理]