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Spectral phase measurement of a Fano resonance using tunable attosecond pulses.

Kotur, Marija LU ; Guenot, Diego LU ; Jiménez-Galán, Á; Kroon, David LU ; Witting Larsen, Esben LU ; Louisy, Maite LU ; Bengtsson, Samuel LU ; Miranda, Miguel LU ; Mauritsson, Johan LU and Arnold, Cord LU , et al. (2016) In Nature Communications 7.
Abstract
Electron dynamics induced by resonant absorption of light is of fundamental importance in nature and has been the subject of countless studies in many scientific areas. Above the ionization threshold of atomic or molecular systems, the presence of discrete states leads to autoionization, which is an interference between two quantum paths: direct ionization and excitation of the discrete state coupled to the continuum. Traditionally studied with synchrotron radiation, the probability for autoionization exhibits a universal Fano intensity profile as a function of excitation energy. However, without additional phase information, the full temporal dynamics cannot be recovered. Here we use tunable attosecond pulses combined with weak infrared... (More)
Electron dynamics induced by resonant absorption of light is of fundamental importance in nature and has been the subject of countless studies in many scientific areas. Above the ionization threshold of atomic or molecular systems, the presence of discrete states leads to autoionization, which is an interference between two quantum paths: direct ionization and excitation of the discrete state coupled to the continuum. Traditionally studied with synchrotron radiation, the probability for autoionization exhibits a universal Fano intensity profile as a function of excitation energy. However, without additional phase information, the full temporal dynamics cannot be recovered. Here we use tunable attosecond pulses combined with weak infrared radiation in an interferometric setup to measure not only the intensity but also the phase variation of the photoionization amplitude across an autoionization resonance in argon. The phase variation can be used as a fingerprint of the interactions between the discrete state and the ionization continua, indicating a new route towards monitoring electron correlations in time. (Less)
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published
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Nature Communications
volume
7
publisher
Nature Publishing Group
external identifiers
  • pmid:26887682
  • scopus:84958576878
  • wos:000371015300001
ISSN
2041-1723
DOI
10.1038/ncomms10566
language
English
LU publication?
yes
id
fa7141d0-a5e3-4b8a-b7d8-3161d5afeaac (old id 8825174)
date added to LUP
2016-03-09 16:43:58
date last changed
2017-09-17 06:50:53
@article{fa7141d0-a5e3-4b8a-b7d8-3161d5afeaac,
  abstract     = {Electron dynamics induced by resonant absorption of light is of fundamental importance in nature and has been the subject of countless studies in many scientific areas. Above the ionization threshold of atomic or molecular systems, the presence of discrete states leads to autoionization, which is an interference between two quantum paths: direct ionization and excitation of the discrete state coupled to the continuum. Traditionally studied with synchrotron radiation, the probability for autoionization exhibits a universal Fano intensity profile as a function of excitation energy. However, without additional phase information, the full temporal dynamics cannot be recovered. Here we use tunable attosecond pulses combined with weak infrared radiation in an interferometric setup to measure not only the intensity but also the phase variation of the photoionization amplitude across an autoionization resonance in argon. The phase variation can be used as a fingerprint of the interactions between the discrete state and the ionization continua, indicating a new route towards monitoring electron correlations in time.},
  articleno    = {10566},
  author       = {Kotur, Marija and Guenot, Diego and Jiménez-Galán, Á and Kroon, David and Witting Larsen, Esben and Louisy, Maite and Bengtsson, Samuel and Miranda, Miguel and Mauritsson, Johan and Arnold, Cord and Canton, Sophie and Gisselbrecht, Mathieu and Carette, T and Dahlström, J M and Lindroth, E and Maquet, A and Argenti, L and Martín, F and L'Huillier, Anne},
  issn         = {2041-1723},
  language     = {eng},
  publisher    = {Nature Publishing Group},
  series       = {Nature Communications},
  title        = {Spectral phase measurement of a Fano resonance using tunable attosecond pulses.},
  url          = {http://dx.doi.org/10.1038/ncomms10566},
  volume       = {7},
  year         = {2016},
}