Momentum space tomographic imaging of photoelectrons

TL;DR

This paper demonstrates a tomography-based method for reconstructing 3-D electron momentum distributions from multiple projections, simplifying electron imaging and applicable to various charged particles.

Contribution

It introduces a tomography technique for electron momentum imaging that works with any laser polarization, extending beyond traditional Abel inversion methods.

Findings

Tomographic reconstructions match Abel inversion results for linear polarization.

Method works with any polarization, broadening applicability.

Simplifies electron imaging technology.

Abstract

We apply tomography, a general method for reconstructing 3-D distributions from multiple projections, to reconstruct the momentum distribution of electrons produced via strong field photoionization. The projections are obtained by rotating the electron distribution via the polarization of the ionizing laser beam and recording a momentum spectrum at each angle with a 2-D velocity map imaging spectrometer. For linearly polarized light the tomographic reconstruction agrees with the distribution obtained using an Abel inversion. Electron tomography, which can be applied to any polarization, will simplify the technology of electron imaging. The method can be directly generalized to other charged particles.