In situ characterization of few-cycle laser pulses in transient absorption spectroscopy.

@article{Blttermann2015InSC,
  title={In situ characterization of few-cycle laser pulses in transient absorption spectroscopy.},
  author={Alexander Bl{\"a}ttermann and Christian D. Ott and Andreas Kaldun and Thomas Ding and Veit Stoo{\ss} and Martin Laux and Marc Rebholz and Thomas Pfeifer},
  journal={Optics letters},
  year={2015},
  volume={40 15},
  pages={
          3464-7
        }
}
Attosecond transient absorption spectroscopy has thus far been lacking the capability to simultaneously characterize the intense laser pulses at work within a time-resolved quantum-dynamics experiment. However, precise knowledge of these pulses is key to extracting quantitative information in strong-field highly nonlinear light-matter interactions. Here, we introduce and experimentally demonstrate an ultrafast metrology tool based on the time-delay-dependent phase shift imprinted on a strong… 

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References

SHOWING 1-10 OF 31 REFERENCES
Attosecond time-resolved autoionization of argon.
TLDR
Numerical simulations revealed that the experimentally observed splitting of the 3s3p⁶4p ¹P line is caused by the coupling between two short-lived highly excited states in the strong laser field.
Two-dimensional spectral interpretation of time-dependent absorption near laser-coupled resonances
We demonstrate a two-dimensional time-domain spectroscopy method to extract amplitude and phase modifications of excited atomic states caused by the interaction with ultrashort laser pulses. The
Transient absorption and reshaping of ultrafast XUV light by laser-dressed helium
We present a theoretical study of transient absorption and reshaping of extreme ultraviolet (XUV) pulses by helium atoms dressed with a moderately strong infrared (IR) laser field. We formulate the
Extracting phase and amplitude modifications of laser-coupled Fano resonances.
TLDR
This general approach provides a physical understanding of the laser-induced spectral shift of absorption-line maxima on a sub-laser-cycle time scale as they are ubiquitously observed in attosecond transient-absorption measurements.
Sub-cycle Oscillations in Virtual States Brought to Light
TLDR
This work probes the transient changes in the absorption of an isolated attosecond extreme ultraviolet (XUV) pulse by helium atoms in the presence of a delayed, few-cycle near infrared (NIR) laser pulse, which uncovers absorption structures corresponding to laser-induced “virtual” intermediate states in the two-color two-photon (X UV+NIR+N IR) and three- photon ( XUV-NIR-Nir) absorption process.
Controlling Atomic Line Shapes
TLDR
Ott et al. (3) demonstrate that manipulations to extreme ultraviolet (XUV) and soft x-ray frequencies has presented a challenge and are demonstrated to be possible.
Atomic transient recorder
TLDR
With the current ∼750-nm laser probe and ∼100-eV excitation, the transient recorder is capable of resolving atomic electron dynamics within the Bohr orbit time.
High-spectral-resolution attosecond absorption spectroscopy of autoionization in xenon
Author(s): Bernhardt, B; Beck, AR; Li, X; Warrick, ER; Bell, MJ; Haxton, DJ; McCurdy, CW; Neumark, DM; Leone, SR | Abstract: The decay of highly excited states of xenon after absorption of extreme
Attosecond electron wave-packet interference observed by transient absorption.
TLDR
The phase relation between the absorption modulation of individual harmonics gives direct evidence for the interference of transiently bound electronic wave packets as the mechanism behind theabsorption modulation.
Theory of attosecond transient absorption spectroscopy of strong-field-generated ions
Strong-field ionization generally produces ions in a superposition of ionic eigenstates. This superposition is generally not fully coherent and must be described in terms of a density matrix. A
...
...