Enhancement of Smith-Purcell radiation with surface-plasmon excitation

作     者：张平 张雅鑫 周俊 刘维浩 钟任斌 刘盛纲 

作者机构：Terahertz Science and Technology Research CentreUniversity of Electronic Science and Technology of China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2012年第21卷第10期

页      面：239-244页

核心收录：

学科分类：070207[理学-光学] 07[理学] 070204[理学-等离子体物理] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 61001031) 

主　　题：surface plasmon Smith-Purcell radiation enhancement 

摘      要：With the aid of a three-dimensional particle-in-cell code simulation,the enhancement of Smith-Purcell radiation with a surface-plasmon mode excited by a single electron bunch and by a premodulated electron beam is considered in the *** the simulation,the model is a grating covered by Ag *** results demonstrate that when the surface-plasmon mode is excited by a single electron bunch,the maximum radiation occurs at an observation angle depending on the surface-plasmon frequency,and the radiation power can be enhanced more than ten *** for pre-bunched electron beam excitation,when one of the harmonics of the bunching frequency is resonant with that of the surface-plasmon mode,the radiation power is twenty times more than that from a perfectly conducting grating excited by the same premodulated electron beam.