Zobrazeno 1 - 10
of 599
pro vyhledávání: '"Uzer, T."'
Publikováno v:
Phys. Rev. E 102, 032218 (2020)
We study the double ionization of atoms subjected to circularly polarized (CP) laser pulses. We analyze two fundamental ionization processes: the sequential (SDI) and non-sequential (NSDI) double ionization in the light of the rotating frame (RF) whi
Externí odkaz:
http://arxiv.org/abs/2006.09024
Publikováno v:
Phys. Rev. Lett. 124, 253203 (2020)
Increasing ellipticity usually suppresses the recollision probability drastically. In contrast, we report on a recollision channel with large return energy and a substantial probability, regardless of the ellipticity. The laser envelope plays a domin
Externí odkaz:
http://arxiv.org/abs/1905.05989
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 52, 125601 (2019)
We study the behavior of reduced models for the propagation of intense laser pulses in atomic gases. The models we consider incorporate ionization, blueshifting, and other nonlinear propagation effects in an ab initio manner, by explicitly taking int
Externí odkaz:
http://arxiv.org/abs/1901.06354
Publikováno v:
Phys. Rev. E 98, 052219 (2018)
We consider the dynamics of electrons in combined strong laser and Coulomb fields. Under a timescale separation condition, we reduce this dynamics to a guiding-center framework. More precisely, we derive a hierarchy of models for the guiding-center d
Externí odkaz:
http://arxiv.org/abs/1808.08039
Publikováno v:
Phys. Rev. A 97, 061402 (2018)
We present a classical model for high harmonic generation during the propagation of an intense laser pulse through an atomic gas. Numerical simulations of the model show excellent quantitative agreement with the corresponding quantum model for the bl
Externí odkaz:
http://arxiv.org/abs/1801.09727
Publikováno v:
Phys. Rev. A 92, 023422 (2015)
We find that Coulomb focusing persists even when the Coulomb field is barely noticeable compared with the laser field. Delayed recollisions proliferate in this regime and bring back energy slightly above the 3.17 U_p high-harmonic cutoff, in stark co
Externí odkaz:
http://arxiv.org/abs/1506.00805
We investigate the process of circularly polarized high harmonic generation in molecules using a bicircular laser field. In this context, we show that molecules offer a very robust framework for the production of circularly polarized harmonics, provi
Externí odkaz:
http://arxiv.org/abs/1501.02557
We revisit the stabilization of ionization of atoms subjected to a superintense laser pulse using nonlinear dynamics. We provide an explanation for the lack of complete ionization at high intensity and for the decrease of the ionization probability a
Externí odkaz:
http://arxiv.org/abs/1412.2205
Publikováno v:
Chemical Physics 366, 1-3 (2009) 64
The uncorrelated (``sequential'') and correlated (``nonsequential'') double ionization of the H2 molecule in strong laser pulses is investigated using the tools of nonlinear dynamics. We focus on the phase-space dynamics of this system, specifically
Externí odkaz:
http://arxiv.org/abs/0906.2672
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics 42 (2009) 165602
Both uncorrelated ("sequential") and correlated ("nonsequential") processes contribute to the double ionization of the helium atom in strong laser pulses. The double ionization probability has a characteristic "knee" shape as a function of the intens
Externí odkaz:
http://arxiv.org/abs/0905.0181