Quantum control of molecular tunneling ionization in the spatiotemporal domain

Ohmura, Hideki; Saito, Naoaki; Morishita, Tōru

doi:10.1103/physreva.83.063407

Cited by 47 publications

(49 citation statements)

References 35 publications

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“…[22] that the Stark shift had to be taken into account in a modified MO-ADK theory in order to reproduce the experimental data for carbonyl sulfide (OCS). However the measurements for the CO molecule [23][24][25] showed that the Stark-corrected MO-ADK (or SC-MOADK) disagrees strongly with experiments. On the contrary to the OCS case, these results imply that the Stark effect should play a minor role in tunneling ionization from CO.…”

Section: Introductionmentioning

confidence: 97%

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: Introductionmentioning

confidence: 97%

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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“…For linearly polarized light, on the other hand, one experiment reports most ionization from the Send [88], while another most perpendicular to the molecular axis [89]. For the CO molecule, as another example, strong-field ionization experiments performed in the tun- neling regime report that ionization occurs most readily when the external field has a component pointing from the C-to the O-end, and the electron leaves from the C-end [90][91][92]. This is in contrast with the results from application [87,93] of SAE approximation tunneling theory [84], which predicts that ionization is most likely when the field points from the O-to the C-end.…”

Section: Strong-field Ionizationmentioning

confidence: 99%

Time-dependent generalized-active-space configuration-interaction approach to photoionization dynamics of atoms and molecules

2014

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We present a wave-function based method to solve the time-dependent many-electron Schrödinger equation (TDSE) with special emphasis on strong-field ionization phenomena. The theory builds on the configuration-interaction (CI) approach supplemented by the generalized-active-space (GAS) concept from quantum chemistry. The latter allows for a controllable reduction in the number of configurations in the CI expansion by imposing restrictions on the active orbital space. The method is similar to the recently formulated time-dependent restricted-active-space (TD-RAS) CI method [D. Hochstuhl, and M. Bonitz, Phys. Rev. A 86, 053424 (2012)]. We present details of our implementation and address convergence properties with respect to the active spaces and the associated account of electron correlation in both ground state and excitation scenarios. We apply the TD-GASCI theory to strong-field ionization of polar diatomic molecules and illustrate how the method allows us to uncover a strong correlation-induced shift of the preferred direction of emission of photoelectrons.

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“…We have reported that the mechanism of the OMS-TI induced by phase-controlled ω + 2ω laser fields can be explained by the geometric structure of the HOMO [26,[29][30][31][32][33]; thus some kind of screening due to multi-electron effects that cancel the Stark shift could be induced. A comprehensive theory involving multielectron effects for any molecule is now in progress, and the experimental results of OSM-TI for C 3 H 5 Cl and C 3 H 5 Br with intermediate conditions will be a benchmark for the developed theory of molecular TI.…”

Section: Resultsmentioning

confidence: 99%

“…Recent experiments with carbon monoxide (CO) on TI induced by intense linearly polarized (LP) two-colour phase-controlled laser fields consisting of a fundamental light and its second-harmonic light ('phase-controlled' means that the relative phase difference is stable and can be externally controlled but not stabilized actively such as phase-stabilized few-cycle pulses. hereafter, LP ω + 2ω laser fields) [26,27] and cold target recoil ion momentum spectroscopy (COLTRIMS) [28] have demonstrated that more tunnelling ionization is observed from the C-side, which has the largeamplitude lobe of the HOMO, than the O-side and that the Stark effect plays a minor role.…”

Section: Introductionmentioning

confidence: 99%

Molecular tunnelling ionization of allyl halides induced by phase-controlled two-colour laser fields

Ohmura¹,

Saito²

2014

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

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A single-electron picture based on the multiconfiguration time-dependent Hartree-Fock method: application to the anisotropic ionization and subsequent high-harmonic generation of the CO molecule S Ohmura et al AbstractWe have investigated the molecular tunnelling ionization (TI) of four allyl halide molecules (C 3 H 5 X; X = F, Cl, Br, I) induced by phase-controlled two-colour laser fields consisting of a fundamental light and a second-harmonic light with a pulse duration of 130 fs and an intensity of 10 12 -10 13 W cm −2. The geometric structure of the highest occupied molecular orbital (HOMO) of the four allyl halides can be systematically changed by replacing the halogen atom. We observed phase-dependent orientation-selective molecular ionization in the four methyl halide molecules. The mechanism of molecular TI is discussed in connection with the geometric structure of the HOMO.

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Quantum control of molecular tunneling ionization in the spatiotemporal domain

Cited by 47 publications

References 35 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

Time-dependent generalized-active-space configuration-interaction approach to photoionization dynamics of atoms and molecules

Molecular tunnelling ionization of allyl halides induced by phase-controlled two-colour laser fields

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