Two-dimensional photoelectron holography in strong-field tunneling ionization by counter rotating two-color circularly polarized laser pulses

"We theoretically studied photoionization of atoms and molecules in the frame of Perelomov-Popov-Terent’ev (PPT) and Ammosov-Delone-Krainov (ADK) theories. Strong-field single ionization of two diatomic molecules, N_2 and O_2, are studied and compared to Ar and Xe atoms, using an 800 nm Ti:sapphire laser in the 3×〖10〗^13 to 1×〖10〗^15 Wcm^(-2) intensity range. To eliminate disagreement between theoretical and experimental findings in a low intensity fields (~6×〖10〗^13 Wcm^(-2)), we considered the influence of shifted ionization potential. Including these effects in the ionization rates, we numerically solved rate equations in order to determine an expression for the ionization yields. The use of modiﬁed ionization potential showed that the ionization yields will actually decrease below values predicted by original (uncorrected) formulas. This paper will discuss the causes of this discrepancy. Keywords: tunneling ionization, ionization rate, ionization yield, molecules. "

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Strong field double ionization of Helium with ultra-short phase stabilized circularly polarized laser pulses

Journal of Physics Conference Series ◽

10.1088/1742-6596/488/3/032010 ◽

2014 ◽

Vol 488 (3) ◽

pp. 032010

Author(s):

M S Schöffler ◽

X Xie ◽

S Roither ◽

D Kartashov ◽

A Baltuska ◽

...

Keyword(s):

Strong Field ◽

Laser Pulses ◽

Double Ionization ◽

Circularly Polarized

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High harmonic generation in two-dimensional Mott insulators

npj Quantum Materials ◽

10.1038/s41535-021-00377-8 ◽

2021 ◽

Vol 6 (1) ◽

Author(s):

Christopher Orthodoxou ◽

Amelle Zaïr ◽

George H. Booth

Keyword(s):

Quantum Monte Carlo ◽

Strong Field ◽

High Harmonic ◽

Mean Field ◽

Laser Pulses ◽

Two Dimensions ◽

Mott Insulators ◽

Strongly Correlated ◽

Two Dimensional ◽

Mean Field Model

AbstractWith a combination of numerical methods, including quantum Monte Carlo, exact diagonalization, and a simplified dynamical mean-field model, we consider the attosecond charge dynamics of electrons induced by strong-field laser pulses in two-dimensional Mott insulators. The necessity to go beyond single-particle approaches in these strongly correlated systems has made the simulation of two-dimensional extended materials challenging, and we contrast their resulting high-harmonic emission with more widely studied one-dimensional analogues. As well as considering the photo-induced breakdown of the Mott insulating state and magnetic order, we also resolve the time and ultra-high-frequency domains of emission, which are used to characterize both the photo-transition, and the sub-cycle structure of the electron dynamics. This extends simulation capabilities and understanding of the photo-melting of these Mott insulators in two dimensions, at the frontier of attosecond non-equilibrium science of correlated materials.

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Electron rotational asymmetry in strong-field photodetachment from F− by circularly polarized laser pulses

Physical Review A ◽

10.1103/physreva.99.023429 ◽

2019 ◽

Vol 99 (2) ◽

Cited By ~ 6

Author(s):

G. S. J. Armstrong ◽

D. D. A. Clarke ◽

A. C. Brown ◽

H. W. van der Hart

Keyword(s):

Strong Field ◽

Laser Pulses ◽

Circularly Polarized

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High quality GeV proton beams from a density-modulated foil target

Laser and Particle Beams ◽

10.1017/s0263034609990334 ◽

2009 ◽

Vol 27 (4) ◽

pp. 611-617 ◽

Cited By ~ 22

Author(s):

T.P. Yu ◽

M. Chen ◽

A. Pukhov

Keyword(s):

Laser Intensity ◽

Laser Pulses ◽

Two Dimensional ◽

High Quality ◽

Proton Acceleration ◽

Circularly Polarized ◽

Particle In Cell ◽

Efficient Energy ◽

Peak Energy ◽

Foil Target

AbstractWe study proton acceleration from a foil target with a transversely varying density using multi-dimensional Particle-in-Cell (PIC) simulations. In order to reduce electron heating and deformation of the target, circularly polarized Gaussian laser pulses at intensities on the order of 1022 Wcm−2 are used. It is shown that when the target density distribution fits that of the laser intensity profile, protons accelerated from the center part of the target have quasi-monoenergetic spectra and are well collimated. In our two-dimensional PIC simulations, the final peak energy can be up to 1.4 GeV with the full-width of half maximum divergence cone of less than 4°. We observe highly efficient energy conversion from the laser to the protons in the simulations.

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