Role of Coulomb repulsion in correlated-electron emission from a doubly excited state in nonsequential double ionization of molecules

Huang, Cheng; Guo, Wenliang; Zhou, Yueming; Wu, Zheng-Mao

doi:10.1103/physreva.93.013416

Cited by 33 publications

(7 citation statements)

References 58 publications

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“…However, the computational demand is too large [39,40]. In recent years, the classical (semiclassical) methods have been well developed and widely used [12][13][14][15][16][41][42][43]. Though some quantum effects, such as interference [18,19], can not be captured, the classical methods have been proved to be reliable and effective tools in studying NSDI.…”

Section: Theoretical Methodsmentioning

confidence: 99%

Universal time delay in the recollision impact ionization pathway of strong-field nonsequential double ionization

Zhou

2017

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

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With the semiclassical ensemble model, we investigated the correlated electron dynamics in the recollision impact ionization (RII) pathway of strong-field nonsequential double ionization (NSDI) at different laser wavelengths. Our results show that there is a remarkable time delay (about 400 attoseconds) between double ionization and recollision for a considerable part of the RII events. This type of event is responsible for the valley structure in the correlated electron momentum spectra along the laser polarization direction. More interestingly, our results show that this time delay is independent of the wavelength. This universal time delay is of crucial importance for the comprehensive understanding of the correlated electron dynamics in NSDI.

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Section: Theoretical Methodsmentioning

confidence: 99%

Universal time delay in the recollision impact ionization pathway of strong-field nonsequential double ionization

Zhou

2017

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

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“…Further, Schöffler et al studied single-photon double ionization of helium that also leads to back-to-back ejection via quadrupole transitions [21]. In molecules, the motion of the electrons can be controlled by change of the alignment of the (linear) molecule towards the laser field [22,23]. In contrast to the previous studies, we do not focus on particular shapes, frequencies or intensities of the pulse.…”

Section: Introductionmentioning

confidence: 99%

Control of concerted back-to-back double ionization dynamics in helium

Larsson,

Tannor

2020

Preprint

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To first order, a strong, external field doubly-ionizes the electrons in helium such that they are ejected into the same direction (front-to-back motion). Here, using a (1+1)-dimensional model, we optimize the field with the objective that the two electrons be ejected into opposite directions (back-to-back motion). The optimization is performed using four different control procedures: (1) Local control, (2) derivative-free optimization of basis expansions of the field, (3) the Krotov method and (4) control of the classical equations of motions. Superficially, all four procedures give different fields. However, upon a more careful analysis all the fields obtained exploit essentially the same two-step mechanism leading to back-to-back motion: First, the electrons are displaced by the field into the same direction. Second, after the field turns off, the nuclear attraction and the electronelectron repulsion combine to generate the final motion into opposite directions for each electron. By performing quasi-classical calculations, we confirm that this mechanism is essentially classical.

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“…This type of ionization is called recollisionimpact ionization (RII) [1,2]. The bound electron cannot be ionized directly if the energy of the returning electron is less than the ionization potential of the bound electron, then the type of ionization is defined as the recollision-induced excitation with subsequent ionization (RESI) [3,4]. The recollision (RC) process between the first electron and second electron resulting in two electrons ionized in NSDI are strongly correlated [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Influence of relative phase on the nonsequential double ionization process of CO₂ molecules by counter-rotating two-color circularly polarized laser fields

Peng¹,

Bai²,

Zhang³

2021

Commun. Theor. Phys.

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We investigate the nonsequential double ionization (NSDI) of linear triatomic molecules by the counter-rotating two-color circularly polarized (CRTC) laser fields with a classical ensemble method. The results of the simulation reveal that NSDI yield strongly connected with the relative phase. The trajectory tracking method shows that the return time of the electron is controlled by the relative phase. In addition, when we change the CRTC laser wavelengths, the relative phase of the maximum and minimum yield of NSDI also changes. This shows that the influence of the Coulomb potential in the triatomic molecules on the electron return process cannot be ignored. This work will effectively promote the electronic dynamics study of NSDI for the triatomic molecule.

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Role of Coulomb repulsion in correlated-electron emission from a doubly excited state in nonsequential double ionization of molecules

Cited by 33 publications

References 58 publications

Universal time delay in the recollision impact ionization pathway of strong-field nonsequential double ionization

Universal time delay in the recollision impact ionization pathway of strong-field nonsequential double ionization

Control of concerted back-to-back double ionization dynamics in helium

Influence of relative phase on the nonsequential double ionization process of CO₂ molecules by counter-rotating two-color circularly polarized laser fields

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Role of Coulomb repulsion in correlated-electron emission from a doubly excited state in nonsequential double ionization of molecules

Cited by 33 publications

References 58 publications

Universal time delay in the recollision impact ionization pathway of strong-field nonsequential double ionization

Universal time delay in the recollision impact ionization pathway of strong-field nonsequential double ionization

Control of concerted back-to-back double ionization dynamics in helium

Influence of relative phase on the nonsequential double ionization process of CO2 molecules by counter-rotating two-color circularly polarized laser fields

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Influence of relative phase on the nonsequential double ionization process of CO₂ molecules by counter-rotating two-color circularly polarized laser fields