Terahertz Electronic Source Based on Spoof Surface Plasmons on the Doubly Corrugated Metallic Waveguide
Terahertz Electronic Source Based on Spoof Surface Plasmons on the Doubly Corrugated Metallic Waveguide
复制标题
双波纹金属波导上基于欺骗表面等离子体的太赫兹电子源
DOI：
10.1109/tps.2016.2627576
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发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
Pu-Kun Liu
中科院分区：
文献类型：
--
作者：
Yong-Qiang Liu;Chao-Hai Du;Pu-Kun Liu
欺骗表面等离子体（SSP）由于其特殊的光学和物理性质，已成为微波和太赫兹（THz）频谱中一个活跃的研究课题。SSP模式在波纹金属表面的强近场特性使其在开发太赫兹电子源方面具有特别的吸引力。本文提出并研究了一种基于双波纹金属波导上有效产生SSP模式的太赫兹电子源。利用模态展开法得到了SSP模态的解析色散关系，并用有限积分法给出了SSP模态的场分布。此外，采用基于时域有限差分算法的粒子池（PIC）模拟实现了SSP与注入电子束的相互作用。双波纹金属表面间隙的大小对输出功率有显著的影响，PIC仿真结果表明，在1太赫兹附近频率下，在4.5 mm的作用长度内注入19.55 kV， 1 A的电子束，当间隙从90 μm减小到40 μm时，输出功率可从272 mW增加到36.5 W。我们还研究了输出性能与电子束参数的关系，发现在给定的工作频率下存在一个优化的电子束电压。对脉冲和直流电子束的各种电子束进行了研究，发现对于给定的结构，周期电子束的半脉宽比注入电子束的其他发射形状更可取。我们在双波纹金属波导上高效产生SSP模式的研究为太赫兹电子源的开发提供了一条新的途径。
Spoof surface plasmons (SSP) has become an active research topic in microwave and terahertz (THz) spectrum since its extraordinary optical and physical properties. The strong near field of SSP mode on the corrugated metal surfaces makes it especially attractive for developing a THz electronic source. A THz electronic source based on the efficient generation of SSP modes on the doubly corrugated metallic waveguide is proposed and studied in this paper. The analytical dispersion relations of SSP modes are obtained based on a modal expansion method and the field profiles of SSP modes are also presented by the finite integration method. Besides, the interaction between SSP and injected electron beam is modeled and implemented by particle-in-cell (PIC) simulation based on finite difference time domain algorithm. The gap size between the doubly corrugated metal surfaces can significantly influence the output power and PIC simulation results reveal that output power can be increased from 272 mW to 36.5 W when the gap size decreases from 90 to 40 μm at the frequency near 1 THz by the 19.55 kV, 1 A injected electron beam within 4.5-mm interaction length. The dependencies of the output performance on electron beam parameters are also investigated and we find that there is an optimized beam voltage for the given operation frequency. Various electron beams of pulse and direct current electron beam are studied and we find that half pulsewidth of periodical electron beam is more preferable than other emissive shape of injected electron beam for the given structure. Our studies on the efficient generation of SSP modes on the doubly corrugated metallic waveguide may provide a new way to develop THz electronic sources.
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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
影响因子：
4
作者：
Zhang, Ya-Xin;Zhou, Y.;Dong, L.;Liu, Sheng-Gang
通讯作者：
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影响因子：
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作者：
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DOI：
10.1103/physrevstab.10.030701
发表时间：
2007-03
影响因子：
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作者：
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通讯作者：
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影响因子：
3.2
作者：
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影响因子：
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通讯作者：
Xianbao Shi;Zhanliang Wang;Xianfeng Tang;T. Tang;H. Gong;Qing Zhou;Wenfei Bo;Yabin Zhang;Z. Duan;Yanyu Wei;Y. Gong;Jinjun Feng