Theory of High Frequency Stabilization in Focused, Gaussian Pulses
Abstract
The development of high intensity VUV sources opens the possibility of exploring the regime of high frequency stabilization (intensities of α >1) for photon energies greater than the field free ground state ionization potential. Detecting high frequency stabilization effects is complicated, however, by the fact that in a focused, Gaussian laser pulse most atoms experience peak intensities α << 1. We report calculations which demonstrate that in sufficiently intense Gaussian pulses the ionization dynamics are driven by the adiabatic variation of the time-averaged potential in the Kramers-Henneberger frame. This results in an unambiguous signature of new physics in the α > 1 regime: the population of excited states with the same parity as the ground state, and the emission of slow threshold electrons.
- Publication:
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APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts
- Pub Date:
- May 1998
- Bibcode:
- 1998APS..DMP..C108S