4.8 Article

Extreme Ultraviolet Wave Packet Interferometry of the Autoionizing HeNe Dimer

Journal

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 13, Issue 36, Pages 8470-8476

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.2c01619

Keywords

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Funding

  1. Bundesministerium fur Bildung and Forschung (BMBF) STAR [05K19VF3]
  2. European Research Council (ERC) [694965]
  3. Deutsche Forschungsgemeinschaft (DFG) [RTG 2079, RTG 2717, FOR 1789]
  4. Swedish Research Council
  5. Knut and Alice Wallenberg Foundation, Sweden
  6. Danish Council for Independent Research [1026-00299B]

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Femtosecond extreme ultraviolet wave packet interferometry (XUV-WPI) was used to study resonant interatomic Coulombic decay (ICD) in the HeNe dimer. By utilizing an XUV phase-cycling scheme, the high demands on phase stability and sensitivity for vibronic XUV-WPI of molecular-beam targets were met. The experiment demonstrated vibronic dephasing and rephasing signatures, ultrafast decoherence related to the ICD process, and high-resolution molecular absorption spectrum. This study provides a promising method for real-time analysis of ultrafast ICD processes with high temporal and spectral resolution.
Femtosecond extreme ultraviolet wave packet interferometry (XUV-WPI) was applied to study resonant interatomic Coulombic decay (ICD) in the HeNe dimer. The high demands on phase stability and sensitivity for vibronic XUV-WPI of molecular-beam targets are met using an XUV phase-cycling scheme. The detected quantum interferences exhibit vibronic dephasing and rephasing signatures along with an ultrafast decoherence assigned to the ICD process. A Fourier analysis reveals the molecular absorption spectrum with high resolution. The demonstrated experiment shows a promising route for the real-time analysis of ultrafast ICD processes with both high temporal and high spectral resolution.

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