Correlated Two-Electron Momentum Spectra for Strong-Field Nonsequential Double Ionization of He at 800 nm

Rudenko, Artem; Jesus, V. L. B. de; Ergler, Th.; Zrost, K.; Feuerstein, B.; Schröter, C. D.; Moshammer, R.; Ullrich, J.

doi:10.1103/physrevlett.99.263003

Cited by 239 publications

(147 citation statements)

References 30 publications

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“…These experiments found pronounced signatures of correlated electron motion that disappear for high laser intensities [3]. Under high resolution, these signatures were found to include "fingerlike" [4] or "V-shaped" [5] structures. The joint momentum distributions were also shown to be sensitive to the carrier envelope phase (CEP) of a few-cycle laser pulse [6,7].…”

Section: Introductionmentioning

confidence: 92%

“…Electron correlations play a necessary and unique role in NSDI, which cannot be explained within an independent electron model. Later, more detailed experimental measurements gave the differential momentum distributions of the two ionized electrons [3][4][5]. These experiments found pronounced signatures of correlated electron motion that disappear for high laser intensities [3].…”

Section: Introductionmentioning

confidence: 99%

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Two-photon double ionization of helium: Evolution of the joint angular distribution with photon energy and two-electron energy sharing

Zhang

Peng

et al. 2011

Phys. Rev. A

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Ab initio calculations of two-photon double ionization of helium with photon energies varying from the nonsequential regime to well above the double-ionization threshold are presented. A systematic study of the joint angular distributions of the two ionized electrons at different energy sharing shows that the role of electron correlations is imprinted in the joint angular distribution. In particular, a rather general pattern is identified in the nonsequential regime that is independent of photon energy, pulse length, and energy sharing between the two electrons. Interestingly, the same distribution pattern is found for the equal-energy-sharing case, even when the photon energy is well above the double-ionization threshold. In the case of an extremely uneven energy sharing, the distribution pattern changes drastically as the photon energy is increased. In particular, when the photon energy is greater than the second-ionization threshold, the dominant emission mode of the two electrons switches gradually from "back to back" to "side by side." Finally, the joint angular distribution is found to provide clear evidence of the role of electron correlations in the initial state.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Two-photon double ionization of helium: Evolution of the joint angular distribution with photon energy and two-electron energy sharing

Zhang

Peng

et al. 2011

Phys. Rev. A

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“…Recording the momentum spectra of doubly 10,11 and multiply 7 charged ions provided clear evidence that the emission of the second electron is triggered by the laser-driven recollision of the first electron with its parent ion. Even more insight into the process was gained in kinematically complete studies where the correlated two-electron momentum distributions were measured 11 and investigated for different laser parameters [12][13][14][15] . Measurements of the dynamics of NSDI in near-single cycle laser pulses have been restricted to recoil-ion spectra, which did not allow for the direct retrieval of the correlated electron-emission dynamics 16,17 .…”

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confidence: 99%

Attosecond tracing of correlated electron-emission in non-sequential double ionization

et al. 2012

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Despite their broad implications for phenomena such as molecular bonding or chemical reac tions, our knowledge of multi electron dynamics is limited and their theoretical modelling remains a most difficult task. From the experimental side, it is highly desirable to study the dynamical evolution and interaction of the electrons over the relevant timescales, which extend into the attosecond regime. Here we use near single cycle laser pulses with well defined electric field evolution to confine the double ionization of argon atoms to a single laser cycle. The measured two electron momentum spectra, which substantially differ from spectra recorded in all previous experiments using longer pulses, allow us to trace the correlated emission of the two electrons on sub femtosecond timescales. The experimental results, which are discussed in terms of a semiclassical model, provide strong constraints for the development of theories and lead us to revise common assumptions about the mechanism that governs double ionization.

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“…Our ultimate objective is to apply the calibrated DWBA to simulate the correlated momentum distributions in nonsequential double ionization (NSDI) of He in strong laser fields [9,10].…”

Section: Introductionmentioning

confidence: 99%

Calculation of differential cross sections for electron impact excitation of H and He+

Lai¹,

Chen²,

Pan³

et al. 2014

JAMS

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Abstract. We present the distorted wave Born approximation (DWBA) for electron impact excitation and a method to calibrate the DWBA. With the calibrated DWBA, the differential cross sections (DCS) for excitation of H and He + from 1s to 2s and 2p are calculated and the results are compared with the absolute experimental measurements for H at incident energies of 50 eV and 100 eV. It has been found that the theoretical results are in very good agreement with the experiment, which confirms the validity of the calibration procedure. This work prepares an efficient theoretical method for numerical simulations of non-sequential double ionization of He in strong laser pulse in which laser-induced electron impact excitation of He + is involved. PACS: 34.80.Dp, 34.50.Rk

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Correlated Two-Electron Momentum Spectra for Strong-Field Nonsequential Double Ionization of He at 800 nm

Cited by 239 publications

References 30 publications

Two-photon double ionization of helium: Evolution of the joint angular distribution with photon energy and two-electron energy sharing

Two-photon double ionization of helium: Evolution of the joint angular distribution with photon energy and two-electron energy sharing

Attosecond tracing of correlated electron-emission in non-sequential double ionization

Calculation of differential cross sections for electron impact excitation of H and He+

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