Electron-beam-driven anomalous Doppler effects in Smith–Purcell radiation  

作　　者：XIAOQIUYAN ZHANG TIANYU ZHANG ZHUOCHENG ZHANG XINGXING XU DIWEI LIU ZHAOYUN DUAN YANYU WEI YUBIN GONG LIANG JIE WONG MIN HU 

机构地区：[1]Terahertz Research Center,School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China [2]Key Laboratory of Terahertz Technology,Ministry of Education,Chengdu 610054,China [3]School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore

出　　处：《Photonics Research》2024年第1期78-84,共7页光子学研究（英文版）

基　　金：Key Laboratory of THz Technology;Fundamental Research Funds for the Central Universities(ZYGX2020ZB007);National Natural Science Foundation of China (61921002, 61988102, 62071108)。

摘　　要：The interaction between electrons and matter is an effective means of light emission,through mechanisms including Cherenkov radiation and Smith–Purcell radiation(SPR).In this study,we show that the superlight inverse Doppler effects can be realized in reverse Smith–Purcell radiation excited by a free electron beam with a homogeneous substrate.In particular,we find that two types of anomalous SPR exist in the homogenous substrate:special SPR and reverse SPR.Our results reveal that the electron velocity can be tuned to simultaneously excite different combinations of normal SPR,special SPR,and reverse SPR.The proposed manifold light radiation mechanism can offer greater versatility in controlling and shaping SPR.

关 键 词：ANOMALOUS BEAM ELECTRON 

分 类 号：O462[理学—电子物理学]