论文标题
来自光谱域幽灵成像的光子能量分辨速度图成像
Photon Energy-Resolved Velocity Map Imaging from Spectral Domain Ghost Imaging
论文作者
论文摘要
我们提出了一种将光子谱相关分析与从速度图图像中的三维动量分布重建相结合的方法，以有效的单步操作。我们通过使用Flash Free-Electron Laser〜（FEL）的售价$ 2P $壳的光电离（FEL）来证明其功效。尽管来自FEL的电离脉冲的平均带宽很大，但由于AR $^+（2p^{-1}）$的自旋轨道分裂而引起的不同光谱特征。这证明了比常规分析方法具有明显的优势，它将对使用FEL源进行速度图成像实验广泛有益。结合能谱的检索线宽接近用于收集数据的光谱仪规定的分辨率限制。我们的方法提出了将光谱域幽灵成像扩展到可观察到高维的情况的路径。
We present an approach that combines photon spectrum correlation analysis with the reconstruction of three-dimensional momentum distribution from velocity map images in an efficient, single-step procedure. We demonstrate its efficacy with the results from the photoionization of the $2p$-shell of argon using the FLASH free-electron laser~(FEL). Distinct spectral features due to the spin-orbit splitting of Ar$^+(2p^{-1})$ are resolved, despite the large average bandwidth of the ionizing pulses from the FEL. This demonstrates a clear advantage over the conventional analysis method, and it will be broadly beneficial for velocity map imaging experiments with FEL sources. The retrieved linewidth of the binding energy spectrum approaches the resolution limitation prescribed by the spectrometers used to collect the data. Our approach presents a path to extend spectral-domain ghost imaging to the case where the photoproduct observable is high-dimensional.
