Dynamics of Argon Clusters in an Intense Laser Pulse: Bloch-Like Hydrodynamic Model

• Authors: M. Rusek , A. Orłowski
• Languages of publication: EN

Abstracts

EN

The dynamics of small (<55 atoms) argon clusters ionized by an intense, infrared, femtosecond laser pulse is studied using a Bloch-like hydrodynamic model. Evolution of both free electrons and ions formed in the cluster explosion process is examined. Oscillations of the electron cloud in a rare-gas atomic cluster are described as a motion of a fluid obeying Bloch-like hydrodynamic equations. Our theoretical approach includes all possible ionization mechanisms: tunnel (or field) ionization both by an external laser field, and by an internal field due to the space-charge distribution inside the cluster, as well as electron-impact (or collisional) ionization. The results of our simulations are compared both with experimental findings and with predictions of other theoretical models.

Keywords

EN

36.40.-c; 32.80.Rm; 42.50.Hz; 07.05.Tp

Discipline

• 42.50.Hz: Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift(for multiphoton ionization and excitation of atoms and molecules, see 32.80.Rm, and 33.80.Rv, respectively)
• 32.80.Rm: Multiphoton ionization and excitation to highly excited states
• 36.40.-c: Atomic and molecular clusters(see also 61.46.-w Nanoscale materials in condensed matter)
• 07.05.Tp: Computer modeling and simulation

• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 106
• Issue: 1
• Pages: 3-12

Dates

published

2004-07

received

2004-05-07

Contributors

author

M. Rusek

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

A. Orłowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.106.3