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  Extracting Phase and Amplitude Modifications of Laser-Coupled Fano Resonances

Kaldun, A., Ott, C. R., Blättermann, A., Laux, M., Meyer, K., Ding, T., et al. (2014). Extracting Phase and Amplitude Modifications of Laser-Coupled Fano Resonances. Physical Review Letters, 112(10): 103001. doi:10.1103/PhysRevLett.112.103001.

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 Creators:
Kaldun, Andreas1, Author           
Ott, Christian Reinhold1, Author           
Blättermann, Alexander1, Author           
Laux, Martin1, Author           
Meyer, Kristina1, Author           
Ding, Thomas1, Author           
Fischer, Andreas1, Author           
Pfeifer, Thomas1, Author           
Affiliations:
1Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society, ou_2025284              

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 Abstract: Fano line shapes observed in absorption spectra encode information on the amplitude and phase of the optical dipole response. A change in the Fano line shape, e.g., by interaction with short-pulsed laser fields, allows us to extract dynamical modifications of the amplitude and phase of the coupled excited quantum states. We introduce and apply this physical mechanism to near-resonantly coupled doubly excited states in helium. This general approach provides a physical understanding of the laser-induced spectral shift of absorption-line maxima on a sub-laser-cycle time scale as they are ubiquitously observed in attosecond transient-absorption measurements.

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Language(s): eng - English
 Dates: 2014-03-10
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.112.103001
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Title: Physical Review Letters
  Other : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 112 (10) Sequence Number: 103001 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1