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Attosecond photoionization dynamics with stimulated core-valence transitions

Dahlström, Marcus LU ; You, Jhih-An and Rohringer, Nina (2016) In Physical Review A - Atomic, Molecular, and Optical Physics 93(3).
Abstract
We investigate ionization of neon atoms by an isolated attosecond pump pulse in the presence of two coherent
extreme ultraviolet or x-ray probe fields. The probe fields are tuned to a core-valence transition in the residual ion
and induce spectral shearing of the photoelectron distributions. We show that the photoelectron-ion coincidence
signal contains an interference pattern that depends on the temporal structure of the attosecond pump pulse
and the stimulated core-valence transition. Many-body perturbation theory is used to compute “atomic response
times” for the processes and we find strikingly different behavior for stimulation to the outer-core hole (2p ↔ 2s)
and stimulation to the inner-core hole (2p ↔ 1s).... (More)
We investigate ionization of neon atoms by an isolated attosecond pump pulse in the presence of two coherent
extreme ultraviolet or x-ray probe fields. The probe fields are tuned to a core-valence transition in the residual ion
and induce spectral shearing of the photoelectron distributions. We show that the photoelectron-ion coincidence
signal contains an interference pattern that depends on the temporal structure of the attosecond pump pulse
and the stimulated core-valence transition. Many-body perturbation theory is used to compute “atomic response
times” for the processes and we find strikingly different behavior for stimulation to the outer-core hole (2p ↔ 2s)
and stimulation to the inner-core hole (2p ↔ 1s). The response time of the inner-core transition is found to be
comparable to that of state-of-the-art laser-based characterization techniques for attosecond pulses. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A - Atomic, Molecular, and Optical Physics
volume
93
issue
3
publisher
American Physical Society (APS)
external identifiers
  • scopus:84961689503
ISSN
1094-1622
language
English
LU publication?
no
id
6bbb2991-cf56-4c10-bd58-b2fba7cecd78
date added to LUP
2017-06-15 12:54:18
date last changed
2017-06-26 10:53:55
@article{6bbb2991-cf56-4c10-bd58-b2fba7cecd78,
  abstract     = {We investigate ionization of neon atoms by an isolated attosecond pump pulse in the presence of two coherent<br/>extreme ultraviolet or x-ray probe fields. The probe fields are tuned to a core-valence transition in the residual ion<br/>and induce spectral shearing of the photoelectron distributions. We show that the photoelectron-ion coincidence<br/>signal contains an interference pattern that depends on the temporal structure of the attosecond pump pulse<br/>and the stimulated core-valence transition. Many-body perturbation theory is used to compute “atomic response<br/>times” for the processes and we find strikingly different behavior for stimulation to the outer-core hole (2p ↔ 2s)<br/>and stimulation to the inner-core hole (2p ↔ 1s). The response time of the inner-core transition is found to be<br/>comparable to that of state-of-the-art laser-based characterization techniques for attosecond pulses.},
  articleno    = {033413},
  author       = {Dahlström, Marcus and You, Jhih-An  and Rohringer, Nina},
  issn         = {1094-1622},
  language     = {eng},
  number       = {3},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A - Atomic, Molecular, and Optical Physics},
  title        = {Attosecond photoionization dynamics with stimulated core-valence transitions},
  volume       = {93},
  year         = {2016},
}