论文标题
低能传播量表和相干电子加速度在介电纳米结构中
Low Energy Spread Attosecond Bunching and Coherent Electron Acceleration in Dielectric Nanostructures
论文作者
论文摘要
我们展示了一种紧凑的技术，可以压缩电子脉冲至attosecond的长度，同时保持能量扩散相当小。该技术基于纳米硅结构中的介电激光加速度（DLA）。与以前的弹道光学微构思演示不同，我们使用调制器调节器方案在时间和能量坐标中压缩相位空间。在第二阶段，我们表明这些脉冲可以连贯加速，从而产生$ 1.5 \ pm0.1 $ keV的净能量，其剩余能量差异明显大于$ 0.88 \，_ { - 0.2}^{ - 0.2}^{+0.0} $ 0.0} $ kev fwhm。我们表明，通过线性扫描两个阶段之间的相位，可以定期将能量谱连贯地移动，同时保持能量扩张大致恒定。离开束后，电子脉冲也横向聚焦，并且可以匹配为以下加速器晶格。因此，此设置是基于交替的相聚焦（APF）的原型注射器进入可扩展的DLA。
We demonstrate a compact technique to compress electron pulses to attosecond length, while keeping the energy spread reasonably small. The technique is based on Dielectric Laser Acceleration (DLA) in nanophotonic silicon structures. Unlike previous ballistic optical microbunching demonstrations, we use a modulator-demodulator scheme to compress phase space in the time and energy coordinates. With a second stage, we show that these pulses can be coherently accelerated, producing a net energy gain of $1.5\pm0.1$ keV, which is significantly larger than the remaining energy spread of $0.88 \,_{-0.2}^{+0.0}$ keV FWHM. We show that by linearly sweeping the phase between the two stages, the energy spectrum can be coherently moved in a periodic manner, while keeping the energy spread roughly constant. After leaving the buncher, the electron pulse is also transversely focused, and can be matched into a following accelerator lattice. Thus, this setup is the prototype injector into a scalable DLA based on Alternating Phase Focusing (APF).
