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Two-dimensional PIC simulation of atomic clusters in intense laser fields

Published online by Cambridge University Press:  01 June 2004

F. GRESCHIK  and
H.-J. KULL
F. GRESCHIK
Affiliation:
Institut für Theoretische Physik A, Rheinisch-Westfälische Technische Hochschule Aachen, Germany
H.-J. KULL
Affiliation:
Institut für Theoretische Physik A, Rheinisch-Westfälische Technische Hochschule Aachen, Germany
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Abstract

Collective absorption of intense laser pulses by atomic clusters is studied by PIC simulations. The cluster is modeled in two-dimensional calculations as a cylindrical plasma column with a diameter of D = 6.4 nm and an initial electron density of ne0 = 1023 cm−3. The frequency and intensity dependence of absorption is discussed. It is found that nonresonant absorption by electron emission increases as a power law with the laser intensity. The absorbed energy per electron reaches a maximum of about Wmax = mωp2D2 (ωp: plasma frequency, m: electron mass) at the intensity where ionization saturates.

Keywords

Atomic clustersIntense laser fieldsLaser light absorption in plasmasParticle-in-cell methodPlasma simulation
Type
Research Article
Information
Laser and Particle Beams , Volume 22 , Issue 2 , June 2004 , pp. 137 - 145
Copyright
© 2004 Cambridge University Press

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