Strongly directed electron emission in non-sequential double ionization of Ne by intense laser pulses

Moshammer, R.; Ullrich, J.; Feuerstein, B.; Fischer, Daniel; Dorn, Alexander; Schröter, C. D.; López‐Urrutia, J. R. Crespo; Höhr, C.; Rottke, H.; Trump, C.; Wittmann, M.; Korn, G.; Hoffmann, K.; Sandner, W.

doi:10.1088/0953-4075/36/6/101

Cited by 67 publications

(42 citation statements)

References 26 publications

(46 reference statements)

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“…Figure 4 displays the first experiment of this kind, which employed argon [32]; see also [33]. Corresponding results for neon can be found in [34]. We observe that the momentum correlation is concentrated in the first and the third quadrants implying that the electrons are predominantly leaving the laser focus side by side.…”

Section: Ion-momentum Distributions and Electron-electron Momentum Comentioning

confidence: 59%

Many-electron strong-field physics

Becker¹,

Rottke²

2008

Contemporary Physics

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Double and multiple ionisation cannot be understood without the contribution of a non-sequential mechanism, which is due to electron-electron correlation. This paper discusses the experimental manifestations of this effect, from its first footprint in the total yields of multiply charged ions to the highly differential cross-sections for ion and electron production, and the theoretical models that have been set up for their description. Except for the ab initio solution of the time-dependent Schro¨dinger equation, most models implement the recollision mechanism. The kinematical constraints imposed by the former are extensively discussed. A fully quantum-mechanical formalisation of the recollision model in terms of the lowest-order S-matrix element for this process is introduced and its limitations are discussed. Various simplifications are proposed that drop more and more of the quantum features. This is contrasted with purely classical trajectory descriptions with no approximations to the dynamics.

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Section: Ion-momentum Distributions and Electron-electron Momentum Comentioning

confidence: 59%

Many-electron strong-field physics

Becker¹,

Rottke²

2008

Contemporary Physics

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“…addition to explaining the observed above-threshold ionization (ATI) and high harmonic generation (HHG) spectra, also well accounted for NSDI. The evidence in support of the rescattering mechanism accumulated over the years to include experiments on ellipticity dependence of NSDI [4][5][6], ATI [7] and HHG [8,9], ion recoil momentum distributions [10][11][12][13], correlated two-electron momentum distributions [14]a n d molecular clocks [15,16]. It was also shown experimentally that shake-off/shake-up does not play an important role [17].…”

Section: +mentioning

confidence: 98%

Strong-field non-sequential double ionization: wavelength dependence of ion momentum distributions for neon and argon

Alnaser

Comtois

Hasan

et al. 2008

J. Phys. B: At. Mol. Opt. Phys.

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Strong-field non-sequential double ionization: wavelength dependence of ion momentum distributions for neon and argonAbstract Strong-field double ionization of atoms in a non-sequential regime produces longitudinal ion momentum distributions with a characteristic double-peak structure. At 800 nm laser wavelengthinNe 2+ the structure is very pronounced with a well-resolved dip at zero momentum, while for Ar 2+ the dip is very shallow, possibly indicating different mechanisms in the two atoms. We investigated the source of this difference by measuring longitudinal momentum distributions of Ne 2+ and Ar 2+ ions at different laser wavelengths (485, 800, 1313 and 2000 nm) and intensities. The shapes of the experimental momentum distributions for the two atoms exhibit strong dependence on laser wavelength: for both the dip becomes more pronounced at longer wavelengths. At 1300 nm the longitudinal momentum spectrum for Ar

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“…The latter step most likely occurs near one of the field maxima, resulting in small ion drift momenta and, thus, in a 'filling of the valley' in the momentum distributions. Estimations of the cross sections for collision-induced ionization/excitation [9] as well as the analysis of correlated electron momenta [10][11][12] showed that RESI plays a decisive role for He and Ar, whereas for Ne recollision induced electron-impact ionization clearly dominates.…”

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confidence: 99%

Correlated Multielectron Dynamics in Ultrafast Laser Pulse Interactions with Atoms

et al. 2004

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We present the results of the detailed experimental study of multiple ionization of Ne and Ar by 25 and 7 fs laser pulses. For Ne the highly correlated "instantaneous" emission of up to four electrons is triggered by a recollisional electron impact, whereas in multiple ionization of Ar different mechanisms, involving field ionization steps and recollision-induced excitations, play a major role. Using few-cycle pulses we are able to suppress those processes that occur on time scales longer than one laser cycle.

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Strongly directed electron emission in non-sequential double ionization of Ne by intense laser pulses

Cited by 67 publications

References 26 publications

Many-electron strong-field physics

Many-electron strong-field physics

Strong-field non-sequential double ionization: wavelength dependence of ion momentum distributions for neon and argon

Correlated Multielectron Dynamics in Ultrafast Laser Pulse Interactions with Atoms

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