Efficient and Tunable Terahertz Emission by Transforming Surface Waves to Coherent Smith-Purcell Radiation

被引：0

作者：

Liu, Yucheng ^{[1
]}

Liu, Weihao ^{[2
]}

Yu, Zijia ^{[1
]}

Liu, Wenxin ^{[3
]}

Sun, Baogen ^{[1
]}

机构：

[1] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Nanjing 211106, Peoples R China

[3] Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100190, Peoples R China

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2021年 / 49卷 / 01期

关键词：

Smith-Purcell radiation (SPR); surface wave (SW); terahertz radiation; DESIGN; TRAIN;

D O I：

10.1109/TPS.2020.3039971

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We propose and investigate an efficient terahertz radiation scheme using low-energy electron beams, including a single-electron bunch and a train of bunches, to excite cascaded gratings. It combines the mechanisms of wakefield radiation and of Smith-Purcell radiation (SPR) by transforming a series of surface waves into coherent SPR. Compared with the conventional wakefield radiation and SPR schemes, its radiation efficiency and power can be remarkably higher. In addition, it changes the conventional incoherent SPR into coherent emission with frequency being continuously tunable. Thus, it affords a promising way of developing the high power, coherent, and tunable terahertz radiation sources.

引用

页码：455 / 459

页数：5

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