• Corpus ID: 118192813

Real-time evolution of a laser-dressed Helium atom: Attosecond-resolved two-color photoionization study

@article{Shivaram2011RealtimeEO,
  title={Real-time evolution of a laser-dressed Helium atom: Attosecond-resolved two-color photoionization study},
  author={Niranjan H. Shivaram and Henry Timmers and Xiao-Min Tong and Arvinder Singh Sandhu},
  journal={arXiv: Atomic Physics},
  year={2011}
}
Using extreme-ultraviolet attosecond-pulse-trains, we investigate the photoionization dynamics of a Helium atom in the presence of moderately-strong (~10^12 W/cm^2) femtosecond laser pulses. The electronic structure of a laser-dressed atom is traced in real-time through precision measurements of ion-yields and photo-electron angular distributions. Quantum interferences between photo-excitation paths are interpreted using the Floquet formalism. As the laser pulse intensity ramps on femtosecond… 

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