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UFN, 2017, Volume 187, Number 11, Pages 1280–1287 (Mi ufn6049)  

This article is cited in 1 scientific paper (total in 1 paper)

FROM THE ARCHIVE

Multiphoton ionization by a very short pulse

L. V. Keldysh

Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: The detachment of a bound electron by an electric field pulse whose duration ranges from a fraction of to a few times the optical cycle but is long compared to $\hbar /I$ ($\hbar$ — Planck constant, $I$ — binding energy) is studied theoretically, simulating the ionization of atoms by extremely short laser pulses. Because of the strong nonlinearity, the solution to the problem does not reduce to the sum of monochromatic harmonic contributions and depends significantly on the pulse shape features. A general analysis is carried out for an analytical pulse shape, and exact formulas are given for standard pulse shapes such as solitonlike, gaussian, lorenzian, etc., one or a half optical cycle in duration. The intensity and pulse length dependences of the ionization probability are of a near-universal tunneling type at high intensities. However, at moderate intensities in the multiphoton regime, these dependences differ widely for different pulse shapes, with ionization probabilities always a few orders of magnitude higher than for ionization by a monochromatic wave of the same intensity and mean frequency.

DOI: https://doi.org/10.3367/UFNr.2017.10.038229

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English version:
Physics–Uspekhi, 2017, 60:11, 1187–1193

Bibliographic databases:

PACS: 32.80.Rm, 42.50.Hz, 42.65.Re
Received: July 12, 2017
Accepted: October 18, 2017

Citation: L. V. Keldysh, “Multiphoton ionization by a very short pulse”, UFN, 187:11 (2017), 1280–1287; Phys. Usp., 60:11 (2017), 1187–1193

Citation in format AMSBIB
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\transl
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\vol 60
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\pages 1187--1193
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    This publication is cited in the following articles:
    1. A. M. Zheltikov, “Keldysh photoionization theory: through the barriers”, Phys. Usp., 60:11 (2017), 1087–1120  mathnet  crossref  crossref  adsnasa  isi  elib
  • Успехи физических наук Physics-Uspekhi
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