Above threshold ionization beyond the high harmonic cutoff
We present high sensitivity electron energy spectra for xenon in a strong 50 ps, 1.053 m laser field. The above threshold ionization distribution is smoothly decreasing over the entire kinetic energy range (030 eV), with no abrupt changes in the slope. This is in direct contrast to the sharp cutoff observed in xenon optical harmonic generation spectra. Calculations using the single active electron approximation show excellent agreement with the observed electron distributions. These results directly address the unresolved relationship between the electron and photon emission from an atom in an intense field. © 1993 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Schafer, K., Yang, B., Dimauro, L., & Kulander, K. (1993). Above threshold ionization beyond the high harmonic cutoff. Physical Review Letters, 70 (11), 1599-1602. https://doi.org/10.1103/PhysRevLett.70.1599