Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Dahlström, J M"'
Autor:
Alexandridi, C., Platzer, D., Barreau, L., Busto, D., Zhong, S., Turconi, M., Neoričić, L., Laurell, H., Arnold, C. L., Borot, A., Hergott, J. -F., Tcherbakoff, O., Lejman, M., Gisselbrecht, M., Lindroth, E., L'Huillier, A., Dahlström, J. M., Salières, P.
Publikováno v:
Phys. Rev. Research 3, 012012 (2021)
Using a spectrally resolved electron interferometry technique, we measure photoionization time delays between the $3s$ and $3p$ subshells of argon over a large 34-eV energy range covering the Cooper minima in both subshells. The observed strong varia
Externí odkaz:
http://arxiv.org/abs/2007.15305
Autor:
Isinger, M., Squibb, R. J., Busto, D., Zhong, S., Harth, A., Kroon, D., Nandi, S., Arnold, C. L., Miranda, M., Dahlström, J. M., Lindroth, E., Feifel, R., Gisselbrecht, M., L'Huillier, A.
Ultrafast processes in matter, such as the electron emission following light absorption, can now be studied using ultrashort light pulses of attosecond duration ($10^{-18}$s) in the extreme ultraviolet spectral range. The lack of spectral resolution
Externí odkaz:
http://arxiv.org/abs/1709.01780
We investigate an angular dependence of the photoemission time delay in helium as measured by the RABBITT (Reconstruction of Attosecond Beating By Interference of Two-photon Transitions) technique. The measured time delay $ \tau_a=\tau_W+\tau_{cc} $
Externí odkaz:
http://arxiv.org/abs/1605.04539
Autor:
Dahlström, J. M., Lindroth, E.
We describe in detail how attosecond delays in laser-assisted photoionization can be computed using perturbation theory based on two-photon matrix elements. Special emphasis is laid on above-threshold ionization, where the electron interacts with an
Externí odkaz:
http://arxiv.org/abs/1404.3895
We present a robust, ab initio method for addressing atom-light interactions and apply it to photoionization of argon. We use a close-coupling ansatz constructed on a multi-configurational Hartree-Fock description of localized states and B-spline exp
Externí odkaz:
http://arxiv.org/abs/1301.1882
We study laser-assisted photoionization by attosecond pulses using a time-independent formalism based on diagrammatic many-body perturbation theory. Our aim is to provide an ab inito route to the "delays" for this above-threshold ionization process,
Externí odkaz:
http://arxiv.org/abs/1211.2654
This tutorial presents an introduction to the interaction of light and matter on the attosecond timescale. Our aim is to detail the theoretical description of ultra-short time-delays, and to relate these to the phase of extreme ultraviolet (XUV) ligh
Externí odkaz:
http://arxiv.org/abs/1205.6624
Autor:
Dahlström, J. M., Guénot, D., Klünder, K., Gisselbrecht, M., Mauritsson, J., L'Huillier, A., Maquet, A., Taïeb, R.
We study the temporal aspects of laser-assisted extreme ultraviolet (XUV) photoionization using attosecond pulses of harmonic radiation. The aim of this paper is to establish the general form of the phase of the relevant transition amplitudes and to
Externí odkaz:
http://arxiv.org/abs/1112.4144
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 44 (2011) 095602
We investigate the generation of even and odd harmonics using an intense laser and a weak second harmonic field. Our theoretical approach is based on solving the saddle-point equations within the Strong Field Approximation. The phase of the even harm
Externí odkaz:
http://arxiv.org/abs/1102.1291
Autor:
Klünder, K., Dahlström, J. M., Gisselbrecht, M., Fordell, T., Swoboda, M., Guénot, D., Johnsson, P., Caillat, J., Mauritsson, J., Maquet, A., Taïeb, R., L'Huillier, A.
We study photoionization of argon atoms excited by attosecond pulses using an interferometric measurement technique. We measure the difference in time delays between electrons emitted from the $3s^2$ and from the $3p^6$ shell, at different excitation
Externí odkaz:
http://arxiv.org/abs/1012.3863