Terahertz free electron superradiation from mimicking surface plasmons-two electron beams interaction within a 3-mirror quasi-optical cavity

Terahertz free electron superradiation from mimicking surface plasmons-two electron beams interaction within a 3-mirror quasi-optical cavity
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模拟三镜准光腔内表面等离子体激元-两束电子束相互作用产生的太赫兹自由电子超辐射

DOI:
10.1063/1.4808085
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发表时间:
2013-05
影响因子:
4
通讯作者:
Liu, Sheng-Gang
Liu, Sheng-Gang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang, Ya-Xin;Zhou, Y.;Dong, L.;Liu, Sheng-Gang

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模拟表面等离子体与电子束的相互作用为开发太赫兹(THz)辐射源提供了良好的机会。本文在一个特殊的三镜准光学腔中提出并探讨了这种相互作用。三镜准光学腔作为谐振可调系统,其谐振频率可以通过调节镜距来调节。该研究证明了太赫兹自由电子的超辐射是由模拟表面等离子体与结构内形成共振的两束电子束相互作用产生的,三镜腔增强了超辐射的强度。此外,该系统可以在高次谐波超辐射区域工作,具有较高的效率和较低的电流密度。因此,这个概念显示了电子束驱动太赫兹源的应用潜力。
Interaction between mimicking surface plasmons and electron beams provides a good opportunity to develop terahertz (THz) radiation sources. In this paper, such an interaction in a special 3-mirror quasi-optical cavity is presented and explored. The 3-mirror quasi-optical cavity acts as a resonant tunable system, the resonance frequency of which can be tuned by adjusting the distance between mirrors. The study demonstrated THz free electron superradiation from the interaction of mimicking surface plasmons and two electron beams that formed a resonance within the structure, with the 3-mirror cavity enhancing the intensity of superradiation. Moreover, this system can work in the high-harmonic superradiation region with relatively high efficiency and low current density. This concept thus shows the application potential for electron-beam-driven terahertz sources.
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