Laser Assisted Atomic Ionization by a Short XUV Pulse

Risultato della ricerca: Paper

Abstract

We report on numerical results of energy spectra of photoelectrons emitted by irradiating an hydrogen atom with a relatively weak single attosecond XUV pulse in the presence of a two-color IR laser pulse. The densities of probabilities have been obtained by treating the interaction of the atom with the XUV radiation at the first order of the time-dependent perturbation theory and describing the emitted electron through the Coulomb-Volkov wavefunction. The results of the calculations agree with the ones found by numerically solving the time-dependent Schrödinger equation. Specifically, we use an algorithm that implements an high recision variant of the Cranck Nicolson integration method and allows to take into account the singularity in the Coulomb potential. Analysis of the spectra obtained for very long pulses show that certain features may be explained in terms of quantum interferences in the time domain.
Lingua originaleEnglish
Stato di pubblicazionePublished - 2015

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ionization
pulses
lasers
Coulomb potential
infrared lasers
hydrogen atoms
photoelectrons
energy spectra
perturbation theory
interference
color
radiation
atoms
electrons
interactions

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title = "Laser Assisted Atomic Ionization by a Short XUV Pulse",
abstract = "We report on numerical results of energy spectra of photoelectrons emitted by irradiating an hydrogen atom with a relatively weak single attosecond XUV pulse in the presence of a two-color IR laser pulse. The densities of probabilities have been obtained by treating the interaction of the atom with the XUV radiation at the first order of the time-dependent perturbation theory and describing the emitted electron through the Coulomb-Volkov wavefunction. The results of the calculations agree with the ones found by numerically solving the time-dependent Schr{\"o}dinger equation. Specifically, we use an algorithm that implements an high recision variant of the Cranck Nicolson integration method and allows to take into account the singularity in the Coulomb potential. Analysis of the spectra obtained for very long pulses show that certain features may be explained in terms of quantum interferences in the time domain.",
author = "Francesca Morales and Emilio Fiordilino and Riccardo Burlon and Salvatore Basile and Giuseppe Castiglia",
year = "2015",
language = "English",

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TY - CONF

T1 - Laser Assisted Atomic Ionization by a Short XUV Pulse

AU - Morales, Francesca

AU - Fiordilino, Emilio

AU - Burlon, Riccardo

AU - Basile, Salvatore

AU - Castiglia, Giuseppe

PY - 2015

Y1 - 2015

N2 - We report on numerical results of energy spectra of photoelectrons emitted by irradiating an hydrogen atom with a relatively weak single attosecond XUV pulse in the presence of a two-color IR laser pulse. The densities of probabilities have been obtained by treating the interaction of the atom with the XUV radiation at the first order of the time-dependent perturbation theory and describing the emitted electron through the Coulomb-Volkov wavefunction. The results of the calculations agree with the ones found by numerically solving the time-dependent Schrödinger equation. Specifically, we use an algorithm that implements an high recision variant of the Cranck Nicolson integration method and allows to take into account the singularity in the Coulomb potential. Analysis of the spectra obtained for very long pulses show that certain features may be explained in terms of quantum interferences in the time domain.

AB - We report on numerical results of energy spectra of photoelectrons emitted by irradiating an hydrogen atom with a relatively weak single attosecond XUV pulse in the presence of a two-color IR laser pulse. The densities of probabilities have been obtained by treating the interaction of the atom with the XUV radiation at the first order of the time-dependent perturbation theory and describing the emitted electron through the Coulomb-Volkov wavefunction. The results of the calculations agree with the ones found by numerically solving the time-dependent Schrödinger equation. Specifically, we use an algorithm that implements an high recision variant of the Cranck Nicolson integration method and allows to take into account the singularity in the Coulomb potential. Analysis of the spectra obtained for very long pulses show that certain features may be explained in terms of quantum interferences in the time domain.

UR - http://hdl.handle.net/10447/165059

M3 - Paper

ER -