First-order correction terms in the weak-field asymptotic theory of tunneling ionization

Trinh, Vinh H.; Tolstikhin, Oleg I.; Madsen, Lars Bojer; Morishita, Tōru

doi:10.1103/physreva.87.043426

Cited by 49 publications

(74 citation statements)

References 43 publications

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“…We found that accounting for the Stark effect in the MO-ADK theory leads to an improved agreement with the numerical solution of the TDSE at the level of a single-active electron approximation, although the Stark-corrected theories in general tend to overestimate the effect of the permanent dipole. For the tunneling regime, a possible improvement might come from an approach proposed by Tolstikhin and collaborators, by including the first order correction to the WFAT [49]. Extension to the multiphoton regime is needed for more quantitative treatment of polar molecules.…”

Section: Discussionmentioning

confidence: 99%

Influence of permanent dipole and dynamic core-electron polarization on tunneling ionization of polar molecules

Hoang

Zhao

et al. 2017

Phys. Rev. A

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We present a detailed theoretical investigation on strong-field ionization of polar (CO and NO) as well as nonpolar molecules (N 2 , O 2 , and CO 2 ). Our results indicate that accounting for the Stark correction in the molecular tunneling ionization theory leads to overall fairly good agreements with numerical solutions of the time-dependent Schrödinger equation. Furthermore, we show that the effect of dynamic core-electron polarization, in general, has a weak influence on the angle-dependent ionization probability. However, in the case of CO we confirm the recent finding by B. Zhang, J. Yuan, and Z. Zhao [Phys. Rev. Lett. 111, 163001 (2013)] that accounting for dynamic core-polarization is crucial to achieving an overall good agreement with experiments.

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Section: Discussionmentioning

confidence: 99%

Influence of permanent dipole and dynamic core-electron polarization on tunneling ionization of polar molecules

Hoang

Zhao

et al. 2017

Phys. Rev. A

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“…Over the years, beginning with the original Perelomov-PopovTerent'ev (PPT) theory [44][45][46], various corrections have been introduced and extended to molecules as well [10,[47][48][49][50]. We comment that there are other ionization theories, such as the nonadiabatic tunneling ionization (NTI) [51] theory, the weak-field asymptotic theory (WFAT) [52][53][54][55][56], and so on. We will focus on the newer version of the PPT theory [47], which offers simplicity and proven accuracy.…”

Section: Introductionmentioning

confidence: 99%

Analytical model for calibrating laser intensity in strong-field-ionization experiments

Zhao

Jin

et al. 2016

Phys. Rev. A

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The interaction of an intense laser pulse with atoms and molecules depends extremely nonlinearly on the laser intensity. Yet experimentally there still exists no simple reliable methods for determining the peak laser intensity within the focused volume. Here we present a simple method, based on an improved Perelomov-Popov-Terent'ev model, that would allow the calibration of laser intensities from the measured ionization signals of atoms or molecules. The model is first examined by comparing ionization probabilities (or signals) of atoms and several simple diatomic molecules with those from solving the time-dependent Schrödinger equation. We then show the possibility of using this method to calibrate laser intensities for atoms, diatomic molecules as well as large polyatomic molecules, for laser intensities from the multiphoton ionization to tunneling ionization regimes.

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“…These essential developments have been implemented in the weak-field asymptotic theory (WFAT). [17][18][19][20] Other methods that have proven successful in describing strong-field ionization (SFI) of polar molecules include time-dependent multi-electron methods [21][22][23][24][25] but the predictive power of all theories largely remains to be established.…”

Section: Introductionmentioning

confidence: 99%

Role of Multi-Electron Effects in the Asymmetry of Strong-Field Ionization and Fragmentation of Polar Molecules: The Methyl Halide Series

et al. 2015

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We report angle-and momentum-resolved measurements of the dissociative ionization and Coulomb explosion of methyl halides (CH 3 F, CH 3 Cl, CH 3 Br, CH 3 I) in intense phase-controlled two-color laser fields. At moderate laser intensities we find that the emission asymmetry of low-energy CH + 3 fragments from the CH + 3 + X + (X = F,Cl,Br,I) channel reflects the asymmetry of the highest occupied molecular orbital of the neutral molecule with important contributions from the Stark effect. This asymmetry is correctly predicted by the weak-field asymptotic theory, provided that the Stark effect on the ionization potentials is calculated using a non-perturbative multi-electron approach. In the case of high laser intensities we observe a reversal of the emission asymmetries for high-energy CH + 3 fragments, originating from the dissociation of CH 3 X q+ with q ≥ 2. We propose ionization to electronically-excited states to be at the origin of the reversed asymmetries. We also report the measurements of the emission asymmetry of H + 3 which is found to be identical to that of the low-energy CH + 3 fragments measured at moderate laser intensities. All observed fragmentation channels are assigned with the help of CCSD(T) calculations. Our results provide a benchmark for theories of strong-field processes and demonstrate the importance of multi-electron effects in new aspects of the molecular response to intense laser fields.

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First-order correction terms in the weak-field asymptotic theory of tunneling ionization

Cited by 49 publications

References 43 publications

Influence of permanent dipole and dynamic core-electron polarization on tunneling ionization of polar molecules

Influence of permanent dipole and dynamic core-electron polarization on tunneling ionization of polar molecules

Analytical model for calibrating laser intensity in strong-field-ionization experiments

Role of Multi-Electron Effects in the Asymmetry of Strong-Field Ionization and Fragmentation of Polar Molecules: The Methyl Halide Series

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