Evolution of the transverse photoelectron-momentum distribution for atomic ionization driven by a laser pulse with varying ellipticity

Ivanov, Igor

doi:10.1103/physreva.90.013418

Cited by 53 publications

(46 citation statements)

References 23 publications

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“…Alternatively, the negative value of p z can be understood by looking into Eq. (5), which shows the photoelectron momentum distribution is proportional to | p − kẑ|ψ 0 | 2 . Fig.…”

Section: Calculation Resultsmentioning

confidence: 99%

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Longitudinal photoelectron momentum shifts induced by absorbing a single XUV photon in diatomic molecules

Lao

2016

Phys. Rev. A

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The photoelectron momentum shifts along the laser propagation are investigated by the timedependent perturbation theory for diatomic molecules, such as H + 2 , N2 and O2. Such longitudinal momentum shifts characterize the photon momentum sharing in atoms and molecules, and oscillate with respect to photon energies, presenting the double-slit interference structure. The atomic and molecular contributions are disentangled analytically, which gives intuitive picture how the double-slit interference structure is formed. Calculation results show the longitudinal photoelectron momentum distribution depends on the internuclear distance, molecular orientation and photon energy. The current laser technology is ready to approve these theoretical predictions.

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“…Alternatively, the negative value of p z can be understood by looking into Eq. (5), which shows the photoelectron momentum distribution is proportional to | p − kẑ|ψ 0 | 2 . Fig.…”

Section: Calculation Resultsmentioning

confidence: 99%

“…In these studies, the dipole approximation are widely accepted when a Ti:Sapphire laser pulse with an intensity below 10 16 W/cm 2 is introduced [4]. Within the dipole approximation, the photoelectron momentum distribution along the laser propagation direction has a symmetric distribution centered at zero (see Ref [5][6][7] for example).…”

Section: Introductionmentioning

confidence: 99%

Longitudinal photoelectron momentum shifts induced by absorbing a single XUV photon in diatomic molecules

Lao

2016

Phys. Rev. A

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“…The initial state of the system is the ground state of the hydrogen atom. To solve the fully three-dimensional time-dependent Schrödinger equation (TDSE), we employed the procedure described in the works2829. The atom-laser field interaction is described using the length gauge.…”

Section: Theorymentioning

confidence: 99%

Exit point in the strong field ionization process

Ivanov

Nam

Kim

2017

Sci Rep

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We analyze the process of strong field ionization using the Bohmian approach. This allows retention of the concept of electron trajectories. We consider the tunnelling regime of ionization. We show that, in this regime, the coordinate distribution for the ionized electron has peaks near the points in space that can be interpreted as exit points. The interval of time during which ionization occurs is marked by a quick broadening of the coordinate distribution. The concept of the exit point in the tunneling regime, which has long been assumed for the description of strong field ionization, is justified by our analysis.

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“…The parameters responsible for the overall accuracy of the calculation were chosen as in the relativistic case by performing the necessary convergence tests. We do not dwell upon this issue for the nonrelativistic calculation; it was described in detail elsewhere [20,21].…”

Section: Resultsmentioning

confidence: 99%

Spin-flip processes and nondipole effects in above-threshold ionization of hydrogen in ultrastrong laser fields

Ivanov

2017

Phys. Rev. A

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We consider above-threshold ionization of hydrogen atoms in ultrastrong laser fields. We use a time-dependent Dirac equation as a calculational tool. This framework allows one to include relativistic effects such as nondipole effects, effects of the relativistic kinematics, and electron spin effects. Inclusion of the spin effects allows one to consider the spin-flip process accompanying above-threshold ionization. We present and discuss electron momenta distributions for ionization processes with and without spin flips. Electron momenta distributions for the ionization process without a spin flip show a gradual increase of the role of the nondipole effects with increasing electric field. Electron spectra for the spin-flip ionization exhibit cusplike singularities, and the absence of features (such as the presence of dips) in the case of the ionization without a spin flip. We explain these features by invoking perturbation theory arguments.

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Evolution of the transverse photoelectron-momentum distribution for atomic ionization driven by a laser pulse with varying ellipticity

Cited by 53 publications

References 23 publications

Longitudinal photoelectron momentum shifts induced by absorbing a single XUV photon in diatomic molecules

Longitudinal photoelectron momentum shifts induced by absorbing a single XUV photon in diatomic molecules

Exit point in the strong field ionization process

Spin-flip processes and nondipole effects in above-threshold ionization of hydrogen in ultrastrong laser fields

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