Electron Beam Driven Generation of Frequency-Tunable Isolated Relativistic Subcycle Pulses.
Electron Beam Driven Generation of Frequency-Tunable Isolated Relativistic Subcycle Pulses.
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DOI：
10.1103/physrevlett.122.104803
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发表时间：
2018-06
影响因子：
8.6
通讯作者：
I. Thiele;E. Siminos;T. Fulop
中科院分区：
文献类型：
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作者：
I. Thiele;E. Siminos;T. Fulop
提出了一种新的频率可调子周期电磁脉冲产生方案。为此，当电磁种子脉冲被镜子反射时，泵浦电子束被注入到电磁种子脉冲中。电子束被证明能够放大种子脉冲的场，同时使其中心频率上移，并减少其周期数。我们通过一维和二维胞内粒子模拟演示了这种放大。为了解释和优化这一过程，提出了一个基于流体理论的模型。我们估计，利用目前可用的电子束和太赫兹脉冲源，我们的方案能够产生毫焦耳强的中红外亚周期脉冲。
We propose a novel scheme for frequency-tunable subcycle electromagnetic pulse generation. To this end a pump electron beam is injected into an electromagnetic seed pulse as the latter is reflected by a mirror. The electron beam is shown to be able to amplify the field of the seed pulse while upshifting its central frequency and reducing its number of cycles. We demonstrate the amplification by means of 1D and 2D particle-in-cell simulations. In order to explain and optimize the process, a model based on fluid theory is proposed. We estimate that using currently available electron beams and terahertz pulse sources, our scheme is able to produce millijoule-strong midinfrared subcycle pulses.