Introduction to attosecond delays in photoionization
Dahlstrom, J. M. ; L'Huillier, Anne LU
and Maquet, A.
(2012)
In Journal of Physics B: Atomic, Molecular and Optical Physics
45(18).
- Abstract
- 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) light pulses and to the asymptotic phaseshifts of photoelectron wave packets. Special emphasis is laid on time-delay experiments, where attosecond XUV pulses are used to photoionize target atoms at well-defined times, followed by a probing process in real time by a phase-locked, infrared laser field. In this way, the laser field serves as a 'clock' to monitor the ionization event, but the observable delays do not correspond directly to the delay associated with single-photon ionization. Instead, a... (More)
- 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) light pulses and to the asymptotic phaseshifts of photoelectron wave packets. Special emphasis is laid on time-delay experiments, where attosecond XUV pulses are used to photoionize target atoms at well-defined times, followed by a probing process in real time by a phase-locked, infrared laser field. In this way, the laser field serves as a 'clock' to monitor the ionization event, but the observable delays do not correspond directly to the delay associated with single-photon ionization. Instead, a significant part of the observed delay originates from a measurement induced process, which obscures the single-photon ionization dynamics. This artefact is traced back to a phaseshift of the above-threshold ionization transition matrix element, which we call the continuum-continuum phase. It arises due to the laser-stimulated transitions between Coulomb continuum states. As we shall show here, these measurement-induced effects can be separated from the single-photon ionization process, using analytical expressions of universal character, so that eventually the attosecond time delays in photoionization can be accessed. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3190107
- author
- Dahlstrom, J. M.
; L'Huillier, Anne
LU
and Maquet, A.
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physics B: Atomic, Molecular and Optical Physics
- volume
- 45
- issue
- 18
- article number
- 183001
- publisher
- IOP Publishing
- external identifiers
-
- wos:000308809000002
- scopus:84866248310
- ISSN
- 0953-4075
- DOI
- 10.1088/0953-4075/45/18/183001
- language
- English
- LU publication?
- yes
- id
- 8820851e-21a7-442c-8164-702419d9db39 (old id 3190107)
- date added to LUP
- 2016-04-01 12:51:48
- date last changed
- 2022-04-21 18:16:48
@article{8820851e-21a7-442c-8164-702419d9db39,
abstract = {{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) light pulses and to the asymptotic phaseshifts of photoelectron wave packets. Special emphasis is laid on time-delay experiments, where attosecond XUV pulses are used to photoionize target atoms at well-defined times, followed by a probing process in real time by a phase-locked, infrared laser field. In this way, the laser field serves as a 'clock' to monitor the ionization event, but the observable delays do not correspond directly to the delay associated with single-photon ionization. Instead, a significant part of the observed delay originates from a measurement induced process, which obscures the single-photon ionization dynamics. This artefact is traced back to a phaseshift of the above-threshold ionization transition matrix element, which we call the continuum-continuum phase. It arises due to the laser-stimulated transitions between Coulomb continuum states. As we shall show here, these measurement-induced effects can be separated from the single-photon ionization process, using analytical expressions of universal character, so that eventually the attosecond time delays in photoionization can be accessed.}},
author = {{Dahlstrom, J. M. and L'Huillier, Anne and Maquet, A.}},
issn = {{0953-4075}},
language = {{eng}},
number = {{18}},
publisher = {{IOP Publishing}},
series = {{Journal of Physics B: Atomic, Molecular and Optical Physics}},
title = {{Introduction to attosecond delays in photoionization}},
url = {{http://dx.doi.org/10.1088/0953-4075/45/18/183001}},
doi = {{10.1088/0953-4075/45/18/183001}},
volume = {{45}},
year = {{2012}},
}