Comparison between quantum and classical calculations for above threshold ionization of argon

Orimo, Yuki; Tőkési, K.; Sato, Takeshi; Ishikawa, Kenichi L.

doi:10.1140/epjd/e2019-100066-y

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…{Φ I (t)} denote the determinants constructed from n a active orbitals, among which the active electrons are fully correlated. Previously, this method has been applied to different atoms [54,[57][58][59], also successfully reproducing resonantly enhanced HHG from Mn and Mn + [33]. In this study, specifically, we use orbital subspace decomposition shown in figure 6.…”

Section: Resultsmentioning

confidence: 99%

Resonance enhancement of harmonics in the vicinity of 32 nm spectral range during propagation of femtosecond pulses through the molybdenum plasma

Kim

Boltaev

Iqbal

et al. 2020

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

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We demonstrate the enhancement of harmonics in the vicinity of 32 nm while generating them in the Mo laser-produced plasma. The enhanced harmonics centered at around the 25th harmonic of 806 nm radiation were analyzed by different means (delay between heating and driving pulses, dependences of harmonic yield on the driving and heating pulse intensities and durations, different regimes of plasma formation, two-color pump of plasma, application of chirped pulses, etc). The role of strong ionic transition possessing large oscillator strength leading to the growth of the nonlinear optical response is discussed. Comparative studies using molybdenum, silver, and chromium laser-produced plasmas are presented. To validate the experimental findings, we numerically simulate harmonic generation from Mo using full-dimensional, all-electron, first-principles calculations. The calculated harmonic spectra exhibit a prominent peak around 32 nm and a suppression around 36–38 nm, successfully reproducing the experimentally observed features. Our transition-resolved analyses of the calculation results reveal both that the 4p-4d transitions are responsible for the observed enhancement and that the destructive interference between the 4p-4d transitions and the recombination to the 4d orbitals leads to the observed suppression.

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Section: Resultsmentioning

confidence: 99%

Resonance enhancement of harmonics in the vicinity of 32 nm spectral range during propagation of femtosecond pulses through the molybdenum plasma

Kim

Boltaev

Iqbal

et al. 2020

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

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show abstract

“…A strong influence of the second step ionization on the first ionization step was demonstrated. In the third contribution, Orimo et al presented comparisons between quantum and classical calculations for above threshold ionization of an Argon atom interacting with a strong laser pulse [ 20 ]. The time-dependent complete-active-space self-consistent field (TD-CASSCF) method and the classical trajectory Monte Carlo (CTMC) method were used for the cases of quantum and classical calculations, respectively.…”

Section: Theoretical Advancesmentioning

confidence: 99%

“…Three articles [18][19][20] deal with the different photoionization processes of argon. Among them, Lagutin and co-workers studied the two-photon ionization of the 3p shell of Ar in the above-threshold ionization (ATI) exciting-photon energy region [18].…”

Section: Theoretical Advances 31 Photon-induced Processesmentioning

confidence: 99%

Topical Issue on many particle spectroscopy of atoms, molecules, clusters and surfaces editorial

et al. 2021

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Many particle spectroscopy is a subject of continued interest to many experimental and theoretical groups worldwide. It is based on the coincidence spectroscopy of minimum two particles coming from the same elementary process. It is a very powerful tool for studying not just atoms and molecules but also more extended electronic systems such as clusters and surfaces. Due to the large variety of its applications, it is really an interdisciplinary research field. This Topical Issue presents a state-of-the-art description of current research activities in the field of many particle spectroscopy. The contributions to this Issue represent original research results on both experimental and theoretical studies, involving the interaction of various projectiles, like photons, electrons, ions with atoms, molecules, clusters and surfaces.

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Comparison between quantum and classical calculations for above threshold ionization of argon

Cited by 2 publications

References 17 publications

Resonance enhancement of harmonics in the vicinity of 32 nm spectral range during propagation of femtosecond pulses through the molybdenum plasma

Resonance enhancement of harmonics in the vicinity of 32 nm spectral range during propagation of femtosecond pulses through the molybdenum plasma

Topical Issue on many particle spectroscopy of atoms, molecules, clusters and surfaces editorial

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