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Proceedings Paper

Interaction of super-intense light fields with atoms and surfaces
Author(s): Michael C. Downer; William C. Banyai; W. M. Wood; D. C. Anacker; James L. Erskine
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Paper Abstract

Using amplified 100 fs, 616 nm pulses, we employed pump-probe spectroscopy to investigate strong field interactions with gases and metal surfaces. The ionization dynamics of a gas with a pump pulse foeused to 1016 W/cm2 were deduced from spectral shifts in a probe pulse. In addition to above threshold ionization, impact ionization and a nonlinear dependence of the collision frequency on pulse intensity are proposed as mechanisms for the spectral shifts. Also, the cooling time of a high-temperature solid density plasma was measured specifically, the nonequiibrium electron energy distribution excited by a resonantly absorbed pulse focused to 5 x 1012 W/cm2 on a metal surface was measured with a photoelectron time-offlight detector.

Paper Details

Date Published: 1 April 1990
PDF: 9 pages
Proc. SPIE 1209, Picosecond and Femtosecond Spectroscopy from Laboratory to Real World, (1 April 1990); doi: 10.1117/12.17902
Show Author Affiliations
Michael C. Downer, Univ. of Texas/Austin (United States)
William C. Banyai, Univ. of Texas/Austin (United States)
W. M. Wood, Univ. of Texas/Austin (United States)
D. C. Anacker, Univ. of Texas/Austin (United States)
James L. Erskine, Univ. of Texas/Austin (United States)


Published in SPIE Proceedings Vol. 1209:
Picosecond and Femtosecond Spectroscopy from Laboratory to Real World
Keith A. Nelson, Editor(s)

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