We have applied a tomographic imaging method to recreate the full three-dimensional distribution of photoelectrons produced in a strong-field photodetachment process. The method is general and can be applied to any laser polarization. This stands in contrast to traditional imaging inversion methods, such as Abel inversion, which require a prior knowledge of the symmetries of the electron distribution and are therefore limited to experiments using linear or circular polarization. Our method is also useful in a situation where linear polarization is used, since it compensates for detector inhomogeneities by spreading the information on a larger detector surface. In addition it facilitates a method to detect polarization defects. Measurements were made for photodetachment of Ag${}^{-}$ at laser wavelengths of 1310 and 2055 nm, and were found to agree well with simulations in the strong field approximation. The data in the 1310 nm case revealed an unexpected asymmetry in the plane in which the laser polarization axis is rotated. Using a quasistationary quasienergy state (QQES) model, a residual elliptical polarization of $\epsilon =0.21\pm 0.01$ consistently explains the observed asymmetry. We conclude that the method described in this paper has potential to be applied in experiments where a more complete characterization of electron emission distributions is required.

中文翻译：

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通过Ag-的强场光解产生的光电子分布的层析成像

我们已经应用了层析成像方法来重现在强场光分离过程中产生的光电子的完整三维分布。该方法是通用的，并且可以应用于任何激光偏振。这与传统的成像反演方法（例如Abel反演）形成对比，传统的成像反演方法需要先验地掌握电子分布的对称性，因此仅限于使用线性或圆极化的实验。我们的方法在使用线性极化的情况下也很有用，因为它通过在更大的检测器表面上分散信息来补偿检测器的不均匀性。另外，它促进了一种检测偏振缺陷的方法。测量银的光解离${}^{-}$在1310和2055 nm的激光波长下，发现与强场近似中的模拟非常吻合。1310 nm情况下的数据显示出在激光偏振轴旋转的平面中存在意外的不对称性。使用准静态拟能态（QQES）模型，残余椭圆极化$\epsilon =0.21\pm 0.01$一致地解释了观察到的不对称性。我们得出的结论是，本文描述的方法有潜力用于需要更完整地表征电子发射分布的实验中。