Comment on “Direct photodetachment of 
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 by mid-infrared few-cycle femtosecond laser pulses”

Gribakin, G. F.; Law, S. M. K.

doi:10.1103/physreva.94.057401

Cited by 11 publications

(2 citation statements)

References 10 publications

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“…This pattern does not occur for short-range potentials, so that it requires the interplay between the laser field and the Coulomb potential to be able to form. In fact, it is absent both in SFA [41,42] computations and in the photodetachment of negative ions [58,108,109], which show fringes nearly perpendicular to the driving-field polarization in this region. In the literature, the fan-shaped structure has been interpreted as a resonant process involving intermediate bound states with a specific angular momentum, both in the seminal experimental work [39,106] and in subsequent theoretical papers [40][41][42][43].…”

Section: The Fanmentioning

confidence: 92%

It is all about phases: ultrafast holographic photoelectron imaging

2020

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Photoelectron holography constitutes a powerful tool for the ultrafast imaging of matter, as it combines high electron currents with subfemtosecond resolution, and gives information about transition amplitudes and phase shifts. Similarly to light holography, it uses the phase difference between the probe and the reference waves associated with qualitatively different ionization events for the reconstruction of the target and for ascertaining any changes that may occur. These are major advantages over other attosecond imaging techniques, which require elaborate interferometric schemes in order to extract phase differences. For that reason, ultrafast photoelectron holography has experienced a huge growth in activity, which has led to a vast, but fragmented landscape. The present review is an organizational effort towards unifying this landscape. This includes a historic account in which a connection with laserinduced electron diffraction is established, a summary of the main holographic structures encountered and their underlying physical mechanisms, a broad discussion of the theoretical methods employed, and of the key challenges and future possibilities. We delve deeper in our own work, and place a strong emphasis on quantum interference, and on the residual Coulomb potential.

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Section: The Fanmentioning

confidence: 92%

It is all about phases: ultrafast holographic photoelectron imaging

2020

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“…It is worth noting that the 2D-momentum distribution of electrons ejected in the laser field has also been investigated both experimentally [8][9][10][11] and theoretically [12][13][14][15][16]. Little attention has been paid to the spectrum in the direction perpendicular to the laser polarization [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Time–energy analysis of above-threshold ionization in the transverse direction of the linearly polarized laser pulses

Guo

Han

et al. 2017

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

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We use a Wigner-distribution-like function based on the strong field approximation to study the photoelectrons emitted in the direction perpendicular to the laser field polarization in the linearly polarized laser pulses with different pulse durations. The calculated time-energy distributions for few-cycle laser pulses show distinct interference structures with regular energy separation of 2ω, which are consistent with the corresponding energy spectra. Analysis shows that these interference structures can be attributed to the intracycle interference between electrons emitted at times when the laser field is close to its extreme, which is the main reason for the carpet-like pattern in the momentum spectrum. For the longer laser pulse, the energy spectrum shows a much more complicated structure consisting of main peaks with energy separation of 2ω and many subpeaks in between the main peaks. The time-energy distribution indicates that the main peaks and subpeaks are ascribed to intracycle and intercycle interferences.

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Angle-Resolved Electron Spectra of ${{\rm{F}}}^{-}$ Ions by Few-Cycle Laser Pulses

Chen

Zhao

Wang

et al. 2017

Chinese Phys. Lett.

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The above-threshold detachment of ions induced by a linearly polarized few-cycle laser pulse is investigated theoretically using the strong-field approximation model without considering the rescattering mechanism. We first derive an analytical form of transition amplitude for describing the strong-field photodetachment of ions. The integration over time in transition amplitude can be performed using the numerical integration method or the saddle-point (SP) method of Shearer et al. [Phys. Rev. A 88 (2013) 033415]. The validity of the SP method is carefully examined by comparing the energy spectra and photoelectron angular distributions (PADs) with those obtained from the numerical integration method. By considering the volume effect of a focused laser beam, both the energy spectra and the low-energy PADs calculated by the numerical integration method agree very well with the experimental results.

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Comment on “Direct photodetachment of F− by mid-infrared few-cycle femtosecond laser pulses”

Cited by 11 publications

References 10 publications

It is all about phases: ultrafast holographic photoelectron imaging

It is all about phases: ultrafast holographic photoelectron imaging

Time–energy analysis of above-threshold ionization in the transverse direction of the linearly polarized laser pulses

Angle-Resolved Electron Spectra of ${{\rm{F}}}^{-}$ Ions by Few-Cycle Laser Pulses

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