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Collisionless energy absorption in the short-pulse intense laser-cluster interaction

MPG-Autoren
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Kundu,  Mrityunjay
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Bauer,  Dieter
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Kundu, M., & Bauer, D. (2006). Collisionless energy absorption in the short-pulse intense laser-cluster interaction. Physical Review A, 74(6): 063202, pp. 1-11. doi:10.1103/PhysRevA.74.063202.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-7EDF-8
Zusammenfassung
In a previous paper [Phys. Rev. Lett. 96, 123401 (2006)] we have shown by means of three-dimensional particle-in-cell simulations and a simple rigid-sphere model that nonlinear resonance absorption is the dominant collisionless absorption mechanism in the intense, short-pulse laser cluster interaction. In this paper we present a more detailed account of the matter. In particular we show that the absorption efficiency is almost independent of the laser polarization. In the rigid-sphere model, the absorbed energy increases by many orders of magnitude at a certain threshold laser intensity. The particle-in-cell results display maximum fractional absorption around the same intensity. We calculate the threshold intensity and show that it is underestimated by the common overbarrier ionization estimate.