论文标题
通过跨膜Terahertz波形对电子脉冲的时空静态控制
Spatiotemporal attosecond control of electron pulses via subluminal terahertz waveforms
论文作者
论文摘要
用光周期塑造电子束提供电子显微镜的飞秒和attsecend时间分辨率，并实现基本的量子互连续性测量值。但是，有效的光电子控制需要两个光束之间的相互作用延长，以将光子能量和动量转移到自由传播电子中。在这里，我们报告使用旅行的逃生的Terahertz波来实现速度匹配，从而在空间和时间上都高加速度梯度。通过实验和模拟，我们证明了次脉冲压缩，次脉冲压缩，加速度和空间焦点，在选定的Terahertz延迟和相位的控制下，具有单个evanescent-wave元件的亚相关电子脉冲。基于这些结果，我们建议在具有逼真的参数的光束中使用带有两个evanecent terahertz波的对称布置来生成孤立的attosent电子脉冲。这些结果建立了跨膜的Terahertz波作为超快电子脉冲控制的有前途的工具。
Shaping electron beams with the cycles of light provides femtosecond and attosecond time resolution in electron microscopy and enables fundamental quantum-coherent measurements. However, efficient light-electron control requires a prolonged interaction between the two beams for cascaded transfer of photon energy and momentum to the freely propagating electrons. Here we report the use of traveling evanescent terahertz waves to achieve velocity matching and thereby high acceleration gradients both in space and in time. With experiment and simulations, we demonstrate attosecond streaking, temporal pulse compression, acceleration and spatial focusing of sub-relativistic electron pulses with a single evanescent-wave element under the control of selected terahertz delays and phases. Based on these results, we propose to use a symmetric arrangement with two evanescent terahertz waves to generate isolated attosecond electron pulses in a beam with realistic parameters. These results establish subluminal terahertz waves as a promising tool for ultrafast electron pulse control.
