Absorption of few-cycle laser pulses by outer ionization of atomic clustersF. Greschik, L. Arndt and H.-J. Kull
Institute of Theoretical Physics A, Rheinisch Westfälische Technische Hochschule D-52056 Aachen, Germany
received 18 March 2005; accepted in final form 13 September 2005
published online 30 September 2005
Laser light absorption is studied by particle simulations for large atomic clusters interacting with intense few-cycle pulses. A significant part of absorbed energy can be attributed to the potential energy required for outer ionization. A simple shell model accounts for the ionization degree and the ionization potential. High absorption fractions are obtained for clustered gases under common experimental conditions.
36.40.Gk - Plasma and collective effects in clusters.
52.38.Dx - Laser light absorption in plasmas (collisional, parametric, etc.).
52.65.-y - Plasma simulation.
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