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Published June 1, 1989 | public
Journal Article Open

Molecular-dynamics simulations of atomic ionization by strong laser fields


We use molecular-dynamics simulations to study the competition between sequential and collective ionization in low-Z atoms by strong laser fields. The model shows sequential ionization at low fields, changing to collective ionization at large fields. The field strength at which this occurs is lower for higher frequencies. We also study the ionization as a function of pulse length and find that collective ionization is favored for shorter pulses.

Additional Information

©1989 The American Physical Society Received 12 August 1988 We acknoweledge an allocation of computer time from the San Diego Supercomputer Center on their Cray X/MP-48, on which most of these calculations were performed. One of us (D.A.W.) acknowledges financial support from AT&T Bell Laboratories. This work was also supported by NSF Grant Nos. PHY85-05682 and PHY86-04197.


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