Attosecond control of correlated electron dynamics in strong-field nonsequential double ionization by parallel two-color pulses

Ma, Xiaomeng; Zhou, Yueming; Li, Ning; Li, Min; Lu, Peixiang

doi:10.1016/j.optlastec.2018.06.058

Cited by 30 publications

(8 citation statements)

References 67 publications

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“…The natural time scale of the charge migration ranges from hundreds of attoseconds to a few femtoseconds, depending on the composition of the superposed electron wave packet (EWP) and the conformation of the molecule [9,12]. The rapidly developing attosecond technology [13][14][15][16][17][42][43][44] has facilitated the measurement with unprecedented temporal resolution, which opens up the way for tracing the ultrafast charge migration in molecules. By applying an isolated attosecond pulse, one can initiate charge migration in the molecule and then, observe it with another probe pulse [1,2].…”

Section: Introductionmentioning

confidence: 99%

Imaging charge migration in the asymmetric molecule with the holographic interference in strong-field tunneling ionization

Zhou

Tan

et al. 2018

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

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Coherent superposition of several electronic states in molecules induces attosecond charge migration. We theoretically demonstrate a way to observe this attosecond charge migration in the asymmetric molecule HeH 2+ using strong-field photoelectron holography, complementary to our previous work (He M et al 2018 Phys. Rev. Lett. 120, 133204) where the charge migration in the symmetric molecule was monitored. We disentangle the holographic interference from other types of interference in the photoelectron momentum distribution with the Fourier frequency filter method. By employing the holographic fringes originating from the ground state of HeH 2+ as a reference, we develop a feasible approach to visualize the charge migration in the asymmetric molecule with attosecond temporal resolution.

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Section: Introductionmentioning

confidence: 99%

Imaging charge migration in the asymmetric molecule with the holographic interference in strong-field tunneling ionization

Zhou

Tan

et al. 2018

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

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“…In this paper, we use a two-dimensional classical ensemble model to simulate the NSDI process 13,26,27 .…”

Section: Methodsmentioning

confidence: 99%

“…Physicists are particularly interested in the NSDI process because it provides information about the interaction between electrons in the atomic and molecular shells via the recollision process. Based on the energy of the two electrons immediately after the moment of recollision, the NSDI process occurs through four different mechanisms: recollision impact ionization (RII), ionization mechanism recollision-induced excitation with subsequent ionization (RESI), exchange-state ionization (ESI), and recollision-doublely induced excitation with subsequent ionization (RDESI) [12][13][14] . The laser wavelength is a crucial parameter for the recollision process because it influences the returning energy of the ionization electron at the moment of recollision, which is proportional to the ponderomotive energy U p 15 .…”

Section: Introductionmentioning

confidence: 99%

Controlling nonsequential double ionization mechanisms of argon atoms by parallel two-color laser pulses

2023

Sci. Tech. Dev. J.

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Introduction: Recently, physicists have been interested in the nonsequential double ionization (NSDI) process since it provides information about the interaction between electrons in the atomic and molecular shells through the recollistion process. Technically, the development of near-infrared laser pulses has made them one of the most useful tools for studying the electron correlation effect in atoms and molecules. Furthermore, the parallel two-color (PTC) laser pulse is a useful instrument for controlling the process of recollision in a strong laser field. In this paper, with the aim of investigating the role of ionization mechanisms governing the NSDI of argon atoms, we use a PTC laser pulse with wavelengths of 2400 nm and 1200 nm to control the motion of two electrons. We investigate the contribution of ionization mechanisms as well as the correlation dynamics of two electrons upon the change in relative phase between the two component lasers from 0 to 2π. Method: The two-dimensional classical ensemble model is used to simulate the NSDI process, in which the motion of two electrons is governed by Newton's law. Results: The correlated two-electron momentum distribution, recolliding time, and energy distribution after the returning electron's recolliding moment are extraordinarily sensitive to the relative phase of the two lasers. To modulate the ionization mechanisms, the relative phase between two lasers is tuned. Conclusion:The results demonstrate that parallel two-color laser pulses are an effective method of controlling the correlated electron dynamics in nonsequential double ionization.

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“…The 3D classical ensemble model has been introduced for decades [38][39][40][41] and widely used in investigating the physical mechanism of NSDI process. [21,22,29,[41][42][43][44][45][46][47][48][49] In this paper, we employ the method proposed by Eberly et al to study the underlying recollision processes of NSDI. [38] In this classical model, the evolution of the three-particle system is determined by the Newton's equation of motion (atomic units are used throughout until stated otherwise)…”

Section: Methodsmentioning

confidence: 99%

Multiple recollisions in nonsequential double ionization below the recollision-ionization threshold*

Ma¹,

Tong²,

Wang³

et al. 2021

Chinese Phys. B

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By using the three-dimensional classical ensemble model, the recollision dynamics in nonsequential double ionization (NSDI) of Ar by 780-nm laser pulses at (6–1.2) ×1014 W/cm2 was extensively studied. We revealed the picture of multiple-recollision in the double ionization events at the laser intensity region below the recollision-ionization threshold. Via tracing the NSDI trajectories, it was found that the contribution of these multiple-recollision events increases as the laser intensity decreases. In this low intensity region, many multiple-recollision induced NSDI trajectories occur through the doubly excited states. The decay speed of the doubly excited state decreases with the decreasing laser intensity.

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Attosecond control of correlated electron dynamics in strong-field nonsequential double ionization by parallel two-color pulses

Cited by 30 publications

References 67 publications

Imaging charge migration in the asymmetric molecule with the holographic interference in strong-field tunneling ionization

Imaging charge migration in the asymmetric molecule with the holographic interference in strong-field tunneling ionization

Controlling nonsequential double ionization mechanisms of argon atoms by parallel two-color laser pulses

Multiple recollisions in nonsequential double ionization below the recollision-ionization threshold*

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