论文标题
自由电子光谱剪切干涉测定法的量子波函数重建
Quantum wavefunction reconstruction by free-electron spectral shearing interferometry
论文作者
论文摘要
我们提出了一种新的光谱方法，用于重建电子脉冲的量子波函数，自由电子光谱剪切干涉仪（FESSI）。我们采用WIEN滤波器来生成电子波袋的两个延迟的复制品，然后使用由中红外激光驱动的轻电子调节器在能量上移动一个复制品。作为一个直接的演示，我们以数值为10 keV的超短电子脉冲数字地重建了超短电子脉冲。 Fessi在实验上是可行的，使我们能够充分确定光谱阶段的不同顺序及其物理含义，从而提供了一种表征超短电子脉冲的通用方法。
We propose a novel spectral method for reconstructing quantum wavefunction of an electron pulse, free-electron spectral shearing interferometry (FESSI). We employ a Wien filter to generate two time-delayed replicas of the electron wavepacket and then shift one replica in energy using a light-electron modulator driven by a mid-infrared laser. As a direct demonstration, we numerically reconstruct an ultrashort electron pulse with a kinetic energy of 10 keV. FESSI is experimentally feasible and enables us to fully determine distinct orders of spectral phases and their physical implications, providing a universal approach to characterize ultrashort electron pulses.
