论文标题
横向电子束用光形状
Transverse Electron Beam Shaping with Light
论文作者
论文摘要
接口电子和光实现超快电子显微镜，电子的量子控制以及用于高灵敏度成像的新光学元素。在这里，我们首次证明了基于短强度激光脉冲的浮子电势在自由空间中的可编程横向电子束。我们可以实现凸面和凹形电子镜片，焦距为几毫米，与最先进的电子显微镜相当。我们进一步表明，我们可以使用空间光调节器来塑造蓬勃的电位来实现几乎任意的偏转模式。我们的调节器是无损的，可编程的，具有统一填充因子，可以用数百个单独寻址的像素为电子波沿形状铺平道路。
Interfacing electrons and light enables ultrafast electron microscopy, quantum control of electrons, as well as new optical elements for high sensitivity imaging. Here we demonstrate for the first time programmable transverse electron beam shaping in free space based on ponderomotive potentials from short intense laser pulses. We can realize both convex and concave electron lenses with a focal length of a few millimeters, comparable to those in state-of-the-art electron microscopes. We further show that we can realize almost arbitrary deflection patterns by shaping the ponderomotive potentials using a spatial light modulator. Our modulator is lossless, programmable, has unity fill factor, and could pave the way to electron wavefront shaping with hundreds of individually addressable pixels.
