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Theory of attosecond delays in laser-assisted photoionization

Dahlström, J. Marcus, 1982- (författare)
Lund University,Lunds universitet,Stockholms universitet,Fysikum,Computational Atomic Physics Group (Prof. Eva Lindroth),Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Guenot, Diego (författare)
Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Klünder, Kathrin (författare)
Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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Gisselbrecht, Mathieu (författare)
Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Mauritsson, Johan (författare)
Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
L'Huillier, Anne (författare)
Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Maquet, Alfred (författare)
Taïeb, Richard (författare)
visa färre...
 (creator_code:org_t)
Elsevier BV, 2013
2013
Engelska.
Ingår i: Chemical Physics. - : Elsevier BV. - 0301-0104 .- 1873-4421. ; 414, s. 53-64
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • 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 make the connection with the time-delays that have been recently measured in experiments. We find that the overall phase contains two distinct types of contributions: one is expressed in terms of the phase-shifts of the photoelectron continuum wavefunction while the other is linked to continuum–continuum transitions induced by the infrared (IR) laser probe. Our formalism applies to both kinds of measurements reported so far, namely the ones using attosecond pulse trains of XUV harmonics and the others based on the use of isolated attosecond pulses (streaking). The connection between the phases and the time-delays is established with the help of finite difference approximations to the energy derivatives of the phases. The observed time-delay is a sum of two components: a one-photon Wigner-like delay and an universal delay that originates from the probing process itself.

Ämnesord

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Nyckelord

Attosecond
Photoionization
Laser-assisted
High-order harmonics
Delay in photoionization
Phase of ATI
Above-threshold ionization
Attosecond pulse characterization
Atomic phase
Atomic delay
Steaking
RABITT
RABBIT
PROOF
Temporal characterization
fysik
Physics
Atomic delay
Atomic phase
pulse characterization
Above-threshold ionization
Phase of ATI
in photoionization
Delay
High-order harmonics
Laser-assisted
Attosecond
Photoionization
Steaking
RABITT
RABBIT
PROOF
Temporal characterization

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