SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA.
Phys Rev Lett. 2018 Sep 14;121(11):114801. doi: 10.1103/PhysRevLett.121.114801.
In this Letter we report a demonstration of electron ghost imaging. A digital micromirror device directly modulates the photocathode drive laser to control the transverse distribution of a relativistic electron beam incident on a sample. Correlating the structured illumination pattern to the total sample transmission then retrieves the target image, avoiding the need for a pixelated detector. In our example, we use a compressed sensing framework to improve the reconstruction quality and reduce the number of shots compared to raster scanning a small beam across the target. Compressed electron ghost imaging can reduce both acquisition time and sample damage in experiments for which spatially resolved detectors are unavailable (e.g., spectroscopy) or in which the experimental architecture precludes full frame direct imaging.
在这封信件中，我们报告了电子鬼成像的演示。数字微镜器件直接调制光阴极驱动激光，以控制入射在样品上的相对论电子束的横向分布。将结构照明模式与总样品传输相关联，然后即可恢复目标图像，而无需使用像素化探测器。在我们的示例中，我们使用压缩感知框架来提高重建质量，并与在目标上扫描小光束的光栅扫描相比，减少了所需的帧数。在没有空间分辨探测器的实验中（例如光谱学），或者在实验架构排除了全帧直接成像的情况下，压缩电子鬼成像可以减少采集时间和样品损坏。
