论文标题
使用光学近场的电子束像差校正
Electron Beam Aberration Correction Using Optical Near Fields
论文作者
论文摘要
自由电子与光学近场之间的相互作用正在吸引越来越多的注意力，以操纵时空，时间和能量中的电子波函数。依靠当前可达到的实验能力，我们设计了光学近场板，以将电子波函数的横向相烙印，该板在很大程度上可以纠正球形像差，而无需将电气或磁性镜片涉及电子光学元件，并进一步产生了按需的横向局部局部焦点点上的点上剖面。我们的工作引入了基于光电子相互作用的畸变校正的破坏性和强大的方法，这可能导致紧凑而多功能的时间分辨自由电子显微镜和光谱法。
The interaction between free electrons and optical near fields is attracting increasing attention as a way to manipulate the electron wave function in space, time, and energy. Relying on currently attainable experimental capabilities, we design optical near-field plates to imprint a lateral phase on the electron wave function that can largely correct spherical aberration without the involvement of electric or magnetic lenses in the electron optics, and further generate on-demand lateral focal spot profiles. Our work introduces a disruptive and powerful approach toward aberration correction based on light-electron interactions that could lead to compact and versatile time-resolved free-electron microscopy and spectroscopy.
