Quantitative rescattering theory for laser-induced high-energy plateau photoelectron spectra

Abstract

A comprehensive quantitative rescattering (QRS) theory for describing the production of high-energy photoelectrons generated by intense laser pulses is presented. According to the QRS, the momentum distributions of these electrons can be expressed as the product of a returning electron wave packet with the elastic differential cross sections (DCS) between free electrons with the target ion. We show that the returning electron wave packets are determined mostly by the lasers only, and can be obtained from the strong field approximation. The validity of the QRS model is carefully examined by checking against accurate results from the solution of the time-dependent Schrödinger equation for atomic targets within the single active electron approximation. We further show that experimental photoelectron spectra for a wide range of laser intensity and wavelength can be explained by the QRS theory, and that the DCS between electrons and target ions can be extracted from experimental photoelectron spectra. By generalizing the QRS theory to molecular targets, we discuss how few-cycle infrared lasers offer a promising tool for dynamic chemical imaging with temporal resolution of a few femtoseconds.

19 pages, 19 figures

References in corpus (7)

• Accurate retrieval of structural information from laser-induced photoelectron and high-harmonic spectra by few-cycle laser pulses
• Extraction of the species dependent dipole moment from high-order harmonic spectra in rare gas atoms
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• Theory of high-order harmonic generation from molecules by intense laser pulses
• Retrieval of electron-atom scattering cross sections from laser-induced electron rescattering of atomic negative ions in intense laser fields
• Potential for ultrafast dynamic chemical imaging with few-cycle infrared lasers
• FERM3D: A finite element R-matrix electron molecule scattering code

Cited by in corpus (2)

• Quantitative Rescattering Theory for high-order harmonic generation from molecules
• Uncovering multiple orbitals influence in high harmonic generation from aligned N${}_2$