Revisiting the recollisional excitation-tunneling process in strong-field nonsequential double ionization of helium

Chen, Zhangjin; Wang, Yali; Morishita, Tōru; Hao, Xiaolei; Chen, Jing; Zatsarinny, Oleg; Bartschat, Klaus

doi:10.1103/physreva.100.023405

Cited by 19 publications

(26 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is obtained by projecting the DCS for electron impact excitation of Ar + onto the polarization direction to which the parallel momentum k | | 1 of the projectile electron is shifted by −A r [21], i.e.,…”

Section: The Parallel Momentum Distribution D Excmentioning

confidence: 99%

“…The parallel momentum distribution D tun (p | | 2 ) for tunneling ionization of an electron from an excited state is calculated by integrating the two-dimensional (2D) momentum distribution for single ionization over the momentum component perpendicular to the laser polarization. Here, the 2D momentum distribution for single ionization of Ar + is evaluated by solving the time dependent Schrödinger equation (TDSE) [21,32].…”

Section: The Parallel Momentum Distribution D Excmentioning

confidence: 99%

“…where j stands for "exc" or "e2e". Details of the numerical procedures for simulations of the CMD for NSDI of atoms based on the improved QRS model were presented in [20,21,37].…”

Section: The Parallel Momentum Distribution D Excmentioning

confidence: 99%

“…This improvement enables the QRS model to deal with NSDI at intensities below threshold. With the improved QRS model, we revisited both the RDI and RESI in NSDI of helium in 800-nm laser fields [20,21]. It was found that in the simulated CMD for RESI, the fourfold symmetry with regard to the parallel momentum components is broken [21] and the final-state electron repulsion always plays an important role in RDI even at high intensities [22].…”

Section: Introductionmentioning

confidence: 99%

“…In the present paper, we use the improved QRS model [20,21] to study the correlated electron emission in NSDI of Ar by linearly polarized laser pulses with a wavelength of 750 nm and a pulse duration (FWHM) of 4 fs. Our aim is to identify the contributions of RDI and RESI and unveil the underlying mechanisms responsible for the observed cross-shaped structure from a quantum-mechanical point of view.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Nonsequential double ionization of Ar in near-single-cycle laser pulses

et al. 2020

Self Cite

View full text Add to dashboard Cite

Using the improved quantitative rescattering (QRS) model, we simulate the correlated two-electron momentum distributions (CMD) for nonsequential double ionization (NSDI) of Ar by near-single-cycle laser pulses with a wavelength of 750 nm at an intensity of 2.8 × 10 14 W/cm 2. With the accurate cross sections obtained from fully quantum mechanical calculations for both electron impact excitation and electron impact ionization of Ar + , we unambiguously identify the contributions from recollision direct ionization (RDI) and recollision excitation with subsequent ionization (RESI). Our analysis reveals that RESI constitutes the main contribution to NSDI of Ar under the conditions considered here. The simulated results are directly compared with experimental measurements [Bergues et al., Nature Commun. 3, 813 (2012)] in which each NSDI event is tagged with the carrier-envelope phase (CEP). It is found that the overall pattern of both the CEP-resolved and the CEP-averaged CMDs measured in experiment are well reproduced by the QRS model, and the cross-shaped structure in the CEP-averaged CMD is attributed to the strong forward scattering of the recolliding electron as well as the depletion effect in tunneling ionization of the electron from an excited state of the parent ion.

show abstract

Section: The Parallel Momentum Distribution D Excmentioning

confidence: 99%

Section: The Parallel Momentum Distribution D Excmentioning

confidence: 99%

“…where j stands for "exc" or "e2e". Details of the numerical procedures for simulations of the CMD for NSDI of atoms based on the improved QRS model were presented in [20,21,37].…”

Section: The Parallel Momentum Distribution D Excmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nonsequential double ionization of Ar in near-single-cycle laser pulses

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

Third-order S-matrix study of electron-electron correlation in nonsequential double ionization

Jia

Hao

Fan

et al. 2019

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

View full text Add to dashboard Cite

Correlated electron momentum distribution of nonsequential double ionization of a Ne atom in intense laser fields is calculated using a third-order S-matrix formalism which takes into account the interaction between the Coulomb potential of the parent ion and the photoelectrons. Compared to the second-order S-matrix calculation, the correlation distributions of the two processes which take into account the effect of the ionic Coulomb potential on either of the two ionized electrons after their collision tend to be concentrated off the diagonal of the first and third quadrants, which are closer to the experimental observations. Our further analysis shows that this modification to the second-order calculation is due to the fact that, scattering of the emitted electron upon the parent ion will alter the photoelectron angular distribution from concentration in the laser direction to focus in a direction deviating from the laser field. And this will significantly reduce the momentum of the electron in the direction of the laser field. Our results are in accord with previous studies which reveal that electron-nuclear Coulomb interaction, electron-electron collision and the final-state electron repulsion all play significant roles in the formation of the fingerlike structure.

show abstract

Laser-induced nonsequential double ionization of helium: classical model calculations

Sarkadi

2020

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

View full text Add to dashboard Cite

We have investigated the double ionization of helium induced by 45 fs, 394 nm linearly polarized laser pulses for intensities (2.5–150) × 1014 W cm−2. The time evolution of the process was determined by applying the classical ensemble approximation (CEA) model. The results of the calculations obtained for the double-to-single ionization ratio, the momentum distribution of the He2+ recoil ion and the correlated two-electron momentum distribution are compared with the recent experimental data of Henrichs et al (2018 Phys. Rev. A 98 043405). The standard CEA model failed to reproduce the basic features of the experiment. A considerable improvement in the description of the experimental data was achieved by including a two-step process in the model: the formation of a transient double excited state in the first step, and the simultaneous release of the two electrons via ‘over the barrier ionization’ in the second step.

show abstract

Revisiting the recollisional excitation-tunneling process in strong-field nonsequential double ionization of helium

Cited by 19 publications

References 49 publications

Nonsequential double ionization of Ar in near-single-cycle laser pulses

Nonsequential double ionization of Ar in near-single-cycle laser pulses

Third-order S-matrix study of electron-electron correlation in nonsequential double ionization

Laser-induced nonsequential double ionization of helium: classical model calculations

Contact Info

Product

Resources

About