Two-photon Excitation of Hydrogen Atom by Sub-Femtoseconds Electromagnetic Pulses

V. A. Astapenko, S. V. Sakhno

Abstract

The development of methods of generation of ultrashort pulses (USP) of femto- and attosecond duration ranges with controlled parameters necessitates the theoretical study of features of their interaction with a matter. Among such features that do not exist in case of “long” pulses should first of all be the nonlinear dependence of the photoprocess probability W on the USP duration as well as the dependence on the carrier phase with respect to the pulse envelope. It should be noted that if the dependence of the probability W on the phase manifests itself either only for very short pulses, when wt < 1 (w is carrier frequency of the pulse, t its duration), or in case of a nonlinear photoprocess, the function W(t) can differ from a linear function in the limit wt > 1 too for fields of moderate strength, when the perturbation theory is applicable. The present work is dedicated to the theoretical analysis of two-photon excitation of hydrogen atom in a discrete energy spectrum by ultrashort electromagnetic pulses of femto- and subfemtosecond ranges of durations. As examples, excitation of hydrogen atom from the ground state to excited states with a zero orbital moment is considered.

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Paper Citation


in Harvard Style

Astapenko V. and Sakhno S. (2016). Two-photon Excitation of Hydrogen Atom by Sub-Femtoseconds Electromagnetic Pulses . In Proceedings of the 4th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-174-8, pages 51-54. DOI: 10.5220/0005650300510054


in Bibtex Style

@conference{photoptics16,
author={V. A. Astapenko and S. V. Sakhno},
title={Two-photon Excitation of Hydrogen Atom by Sub-Femtoseconds Electromagnetic Pulses},
booktitle={Proceedings of the 4th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2016},
pages={51-54},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005650300510054},
isbn={978-989-758-174-8},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 4th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Two-photon Excitation of Hydrogen Atom by Sub-Femtoseconds Electromagnetic Pulses
SN - 978-989-758-174-8
AU - Astapenko V.
AU - Sakhno S.
PY - 2016
SP - 51
EP - 54
DO - 10.5220/0005650300510054