Exploration of the electron multiple recollision dynamics in intense laser fields with Bohmian trajectories

Jooya, Hossein Z.; Telnov, Dmitry A.; Chu, Shih‐I

doi:10.1103/physreva.93.063405

Cited by 11 publications

(7 citation statements)

References 36 publications

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“…This result strongly supports the use of the classical trajectory in the semiclassical trajectory method to describe the motion of an ionized electron. [22][23][24][25]86] Very recently, in the Bohmian scenario, Jooya et al [87] and Li et al [88] found the laser-driven electron-multirescattering trajectories, which is consistent with the commonly accepted multi-return trajectories of the ionized electron calculated by the semiclassical trajectory method. Coulomb potential, and quantum potential) of one Bohmian trajectory with the initial position of 𝑟 0 .…”

Section: Study Of the Electron Dynamics After Tunneling Ionizationsupporting

confidence: 65%

Bohmian trajectory perspective on strong field atomic processes*

Lai

Liu

2020

Chinese Phys. B

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The interaction of an atom with an intense laser field provides an important approach to explore the ultrafast electron dynamics and extract the information of the atomic and molecular structures with unprecedented attosecond temporal and angstrom spatial resolution. To well understand the strong field atomic processes, numerous theoretical methods have been developed, including solving the time-dependent Schrödinger equation (TDSE), classical and semiclassical trajectory method, quantum S-matrix theory within the strong-field approximation, etc. Recently, an alternative and complementary quantum approach, called Bohmian trajectory theory, has been successfully used in the strong-field atomic physics and an exciting progress has been achieved in the study of strong-field phenomena. In this paper, we provide an overview of the Bohmian trajectory method and its perspective on two strong field atomic processes, i.e., atomic and molecular ionization and high-order harmonic generation, respectively.

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Section: Study Of the Electron Dynamics After Tunneling Ionizationsupporting

confidence: 65%

Bohmian trajectory perspective on strong field atomic processes*

Lai

Liu

2020

Chinese Phys. B

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“…The secondary collisions correspond to those trajectories, which do not recombine in the first return; rather, the electron scatters and returns to the parent core when again the field changes sign. The reduced harmonic emission is attributed to the higher spread of the wave packet for the second revisiting electron, as also corroborated in [47][48][49][50]. The time-frequency analysis of the HHG spectra corresponding to the bi-chromatic driver is presented in figure 1(d).…”

Section: Hhg By Bi-chromatic Field With ωsupporting

confidence: 62%

Bi-chromatic driver enabled control of high harmonic generation in atomic targets

Rajpoot

Holkundkar

2023

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

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We investigated the high-order harmonic generation by interacting time-delayed, linearly polarized bi-chromatic laser pulses with the atomic target. The frequency ratio of secondary to primary fields ($\omega_2/\omega_1$), along with the carrier-envelope-phase (CEP) and respective time-delay between the two pulses, are very instrumental in controlling the ionization of the electron and so the quantum dynamics in continuum. We observed an optimum CEP ($\phi$) and time delay ($t_d$) for a given bi-chromatic frequency ratio, giving maximum cutoff energy. We studied the effect of CEP and time delay for fixed frequency ratio and observed that the harmonic cutoff could be controlled in an experimentally feasible way. Moreover, the harmonic yield in the energy range 140 eV $-$ 240 eV is also calculated, and it is observed that the harmonic yield scales as $\propto -\phi^{5/6}$. The attosecond pulses for different CEP is also calculated by superposing the harmonics in the same energy range, and $\sim 200$ as pulses are observed with peak intensity decreasing with CEP, following the variation of respective harmonic yield with CEP.

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“…The present study is devoted to a description of tunneling ionization employing Bohmian Mechanics [11][12][13], which has recently attracted much attention [14][15][16][17][18][19][20][21][22][23][24]. It will be shown that computing the streamlines of the wavefunction probability over time provides valuable insights and a natural route to understanding complex ultrafast mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of tunneling ionization using Bohmian mechanics

Douguet

Bartschat

2018

Phys. Rev. A

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Recent attoclock experiments and theoretical studies regarding the strong-field ionization of atoms by few-cycle infrared pulses revealed new features that have attracted much attention. Here we investigate tunneling ionization and the dynamics of the electron probability using Bohmian Mechanics. We consider a one-dimensional problem to illustrate the underlying mechanisms of the ionization process. It is revealed that in the major part of the below-the-barrier ionization regime, in an intense and short infrared pulse, the electron does not tunnel "through" the entire barrier, but rather already starts from the classically forbidden region. Moreover, we highlight the correspondence between the probability of locating the electron at a particular initial position and its asymptotic momentum. Bohmian Mechanics also provides a natural definition of mean tunneling time and exit position, taking account of the time dependence of the barrier. Finally, we find that the electron can exit the barrier with significant kinetic energy, thereby corroborating the results of a recent study [Camus et al., Phys. Rev. Lett. 119 (2017) 023201].

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Exploration of the electron multiple recollision dynamics in intense laser fields with Bohmian trajectories

Cited by 11 publications

References 36 publications

Bohmian trajectory perspective on strong field atomic processes*

Bohmian trajectory perspective on strong field atomic processes*

Bi-chromatic driver enabled control of high harmonic generation in atomic targets

Dynamics of tunneling ionization using Bohmian mechanics

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