Electron-Beam-Driven Enhanced Terahertz Coherent Smith-Purcell Radiation Within a Cylindrical Quasi-Optical Cavity
Electron-Beam-Driven Enhanced Terahertz Coherent Smith-Purcell Radiation Within a Cylindrical Quasi-Optical Cavity
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DOI：
10.1109/tthz.2016.2516524
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发表时间：
2016-02
影响因子：
3.2
通讯作者：
Yucong Zhou;Yaxin Zhang;Shenggang Liu
中科院分区：
文献类型：
--
作者：
Yucong Zhou;Yaxin Zhang;Shenggang Liu
本文研究了圆柱形准光学腔内圆柱形表面波与环形电子束相互作用产生的电子束驱动的增强太赫兹相干史密斯-珀塞尔辐射（SPR）。结果表明，准光学腔在相干SPR共振和能量反馈中起着非常重要的作用，从而获得了相对高效率和低电流密度的增强相干SPR。此外，研究发现，有准光腔的相干SPR的辐射场强和场能分别比没有准光腔的提高了5倍和近1个数量级。该系统为高性能太赫兹源提供了另一种方法。
In this paper, an electron-beam-driven enhanced terahertz (THz) coherent Smith-Purcell radiation (SPR) from the interaction between cylindrical surface wave and annular electron beam within a cylindrical quasi-optical cavity is presented. The results show that the quasi-optical cavity plays a very important role in the coherent SPR resonance and energy feedback which leads to an enhanced coherent SPR with relatively high efficiency and low current density. Moreover, it is found that the radiated field intensity and field energy of the coherent SPR with the quasi-optical cavity has been improved five times and almost one order of magnitude, respectively, compared with those without the cavity. This system provides an alternative way for high-performance THz sources.