最大信息光电子计量学
Maximum information photoelectron metrology
摘要：
光电子干涉图以光电子角分布的形式表现出来，是一种高信息量的相干观测。为了从角分辨光电离实验中获得最大的信息，需要记录完整的3D光电子动量分布。在这里，我们应用层析重建技术，以获得这样的三维分布从多光子电离钾原子，并充分分析的能量和角度的内容的三维数据。作为能量的函数获得的PAD与先前的2D数据和详细分析显示出良好的一致性[Hockett et.例如，物理修订信函112，223001（2014）]，但也表明在动量空间的某些区域中意外的连续性破坏，从而揭示了另外的连续干扰，否则无法观察到。这些意见反映了额外的电离途径的存在，最一般的，说明了这个相干观测的最大信息测量的功率。
英文摘要：
Photoelectron interferograms, manifested in photoelectron angular distributions (PADs), are a high-information, coherent observable. In order to obtain the maximum information from angle-resolved photoionization experiments it is desirable to record the full, 3D, photoelectron momentum distribution. Here we apply tomographic reconstruction techniques to obtain such 3D distributions from multiphoton ionization of potassium atoms, and fully analyse the energy and angular content of the 3D data. The PADs obtained as a function of energy indicate good agreement with previous 2D data and detailed analysis [Hockett et. al., Phys. Rev. Lett. 112, 223001 (2014)] over the main spectral features, but also indicate unexpected symmetry-breaking in certain regions of momentum space, thus revealing additional continuum interferences which cannot otherwise be observed. These observations reflect the presence of additional ionization pathways and, most generally, illustrate the power of maximum information measurements of this coherent observable.
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