Two-Dimensional Attosecond Electron Wave Packet Interferometry

TL;DR

This paper introduces a novel two-dimensional electron wave packet interferometry technique using a cycle-shaped orthogonally polarized two-color laser field, enabling precise attosecond and angstrom resolution of electron dynamics.

Contribution

It presents a new interferometry method that disentangles electron interference patterns and minimizes Coulomb effects for detailed electron dynamics analysis.

Findings

Disentangles sub-cycle and inter-cycle interferences in photoelectron spectra.

Minimizes Coulomb influence to improve measurement precision.

Provides detailed valence electron dynamics with attosecond and angstrom resolution.

Abstract

We propose a two-dimensional interferometry based on electron wave packet interference with a cycle-shaped orthogonally polarized two-color laser field. With such method, sub-cycle and inter-cycle interferences can be disentangled into different direction in the measured photoelectron momentum spectra. With the cycle-shaped laser field, the Coulomb influence can be minimized and the overlapping of interference fringes with the complicate low-energy structures can be avoided as well. The contributions of excitation effect and long-range Coulomb potential can be traced in the Fourier domain of the photoelectron distributions. With these advantages, it allows to get precise information on valence electron dynamics of atoms or molecules with attosecond resolution and additional spatial information with angstrom resolution.