Enhanced ionization of counter-rotating electrons via doorway states in ultrashort circularly polarized laser pulses

Walker, Spencer; Kolanz, Lucas; Venzke, Joel; Becker, Andreas

doi:10.1103/physreva.103.l061101

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…Ar(3p ± ) in resonant and in non-resonant circularly polarized pulse Recent studies showed the helicity-dependent ionization of argon in nearly circular polarized pulses in the tunneling regime [45][46][47]. With the counter-clockwise CP, the initial state Ar(3p − ) has larger ionization than We examine the above concepts by simulations with the 3p-4s resonant (105nm) and non-resonant (120nm) 100-cycle CP pulses at peak intensity 1.0 × 10 14 W/cm 2 .…”

Section: 2mentioning

confidence: 99%

“…As a demonstration of the method, we study the argon Ar(3p ± ) states in a resonant and a nonresonant CP pulse. The helicity-dependent ionization behavior in the tunneling regime [45][46][47] is no longer valid in the multiphoton ionization (MPI) process. The development of the p-space method may add an useful tool in the investigation of strong-field problems.…”

Section: Introductionmentioning

confidence: 99%

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Solving time-dependent Schrödinger equation in momentum space with application to strong-field problems

Jheng¹,

Jiang²

2022

Phys. Scr.

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We present a numerical method to solve the time-dependent Schr\"{o}dinger equation (TDSE) in momentum representation (p-space). We show that the method is practically useful and easier than the coordinate space (r-space) method when continuous states are involved. For a single-active electron (SAE) atom, the numerically complete eigenset can be accurately constructed in p-space by quadrature method which bypasses the singularities in the Coulombic kernel. Although there is an ingenious Lande subtraction for dealing with the singularity but is not straightforward. We formulate the time marching algorithms for an SAE atom in linearly polarized (LP) laser pulse and in circularly polarized (CP) pulse, respectively. We show calibrations to literature results to justify the formulations. Argon in a resonant and a nonresonant CP pulse are investigated and show distinct properties from the case of tunneling regime. Together with the currently available powerful graphics processing unit (GPU) for massively parallel computing, the p-space method could provide a useful alternative tool for some problems such as atoms in intense light pulses.

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Section: 2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solving time-dependent Schrödinger equation in momentum space with application to strong-field problems

Jheng¹,

Jiang²

2022

Phys. Scr.

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Strong field-induced quantum dynamics in atoms and small molecules

Eckart

2024

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

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High-intensity laser fields can ionize atoms and molecules and also initiate molecular dissociation. This review is on the recent progress made using experiments that harness the potential of cold-target recoil-ion momentum spectroscopy and femtosecond laser pulses with tailored intense fields. The possibility to image the molecular structure and the orientation of small molecules via the detection of the momenta of the ions is illustrated. The process of non-adiabatic tunnel ionization is analyzed in detail focusing on the properties of the electronic wave packet at the tunnel exit. It is reviewed how the electron gains angular momentum and energy during tunneling in circularly polarized light. The electron is a quantum object with an amplitude and a phase. Most experiments in strong field ionization focus on the absolute square of the electronic wave function. The technique of holographic angular streaking of electrons enables the retrieval of Wigner time delays in strong field ionization, which is a property of the electronic wave function’s phase in momentum space. The relationship between the phase in momentum space and the amplitudes in position space enables access to information about the electron’s position at the tunnel exit. Finally, recent experiments studying entanglement in strong field ionization are discussed.

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Resonance-induced ionization enhancement and suppression of circular states of the hydrogen atom in strong laser fields

Zhao

Zhou

et al. 2021

Phys. Rev. A

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Enhanced ionization of counter-rotating electrons via doorway states in ultrashort circularly polarized laser pulses

Cited by 7 publications

References 22 publications

Solving time-dependent Schrödinger equation in momentum space with application to strong-field problems

Solving time-dependent Schrödinger equation in momentum space with application to strong-field problems

Strong field-induced quantum dynamics in atoms and small molecules

Resonance-induced ionization enhancement and suppression of circular states of the hydrogen atom in strong laser fields

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