Gregory A. McCracken
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View article: Attosecond Coherent Electron Motion in a Photoionized Aromatic Molecule
Attosecond Coherent Electron Motion in a Photoionized Aromatic Molecule Open
In molecular systems, the ultrafast motion of electrons initiates the process of chemical change. Tracking this electronic motion across molecules requires coupling attosecond time resolution to atomic-scale spatial sensitivity. In this wo…
View article: Experimental Demonstration of Attosecond Pump-Probe Spectroscopy with an X-ray Free-Electron Laser
Experimental Demonstration of Attosecond Pump-Probe Spectroscopy with an X-ray Free-Electron Laser Open
Pump-probe experiments with sub-femtosecond resolution are the key to understanding electronic dynamics in quantum systems. Here we demonstrate the generation and control of sub-femtosecond pulse pairs from a two-colour X-ray free-electron…
View article: Filming enhanced ionization in an ultrafast triatomic slingshot
Filming enhanced ionization in an ultrafast triatomic slingshot Open
Filming atomic motion within molecules is an active pursuit of molecular physics and quantum chemistry. A promising method is laser-induced Coulomb Explosion Imaging (CEI) where a laser pulse rapidly ionizes many electrons from a molecule,…
View article: Filming Enhanced Ionization in an Ultrafast Triatomic Slingshot
Filming Enhanced Ionization in an Ultrafast Triatomic Slingshot Open
Filming atomic motion within molecules is an active pursuit of molecular physics and quantum chemistry. A promising method is laser-induced Coulomb Explosion Imaging (CEI) where a laser pulse rapidly ionizes many electrons from a molecule,…
View article: Strong-field ionization of water: Nuclear dynamics revealed by varying the pulse duration
Strong-field ionization of water: Nuclear dynamics revealed by varying the pulse duration Open
Polyatomic molecules in strong laser fields can undergo substantial nuclear motion within tens of femtoseconds. Ion imaging methods based on dissociation or Coulomb explosion therefore have difficulty faithfully recording the geometry depe…
View article: Ionization induced dynamic alignment of water
Ionization induced dynamic alignment of water Open
Two-body dissociation resulting from strong-field double ionization of water is investigated. Two distinct features are seen in the alignment of the fragment momenta with respect to the laser polarization. One feature shows alignment of th…