Simulation of a picosecond laser ablation plasma

Publication Type

Journal Article

Date Published

06/2000

LBNL Report Number

LBNL-45578

Abstract

A theoretical model has been developed to simulate plasma formation and evolution during the early stage of picosecond laser ablation of solids. Surface electron emission was implemented as one boundary condition for plasma development above the target. The simulation results indicate that a plasma forms, with electron density on the order of 1020cm-3, during the picosecond laser pulse. Laser induced gas breakdown assisted by electron emission from the target was found to be the origin of the plasma. In agreement with experimental measurements, longitudinal movement of the electrons inside the plasma was suppressed after the laser pulse. The suppression of the plasma can be attributed to the development of a strong electric field above the target.

Journal

Applied Physics Letters

Volume

76

Year of Publication

2000

Short Title

Appl. Phys. Lett.

Issue

23
3370

Pagination

3370-3372