Nonlinear changes in plasma and crater properties during laser ablation of Si

Publication Type
Journal Article
Authors
DOI
10.1063/1.124646
LBL Report Number
LBNL-44076
Abstract

A dramatic change in plasma characteristics, as well as a significant increase in the quantity of ablated mass were observed at a laser power density threshold of 20 GW/cm2. The electron number density and temperature of the laser-induced plasma show dramatic changes in their nonlinear behavior in the range of 2-80 GW/cm2. The crater volume undergoes some type of phase explosion at the threshold. Mechanisms such as inverse bremsstrahlung and self-regulation were used to describe the behavior below threshold. Self-focusing and critical temperature are discussed to explain the dramatic changes at the threshold.

Journal
Applied Physics Letters
Volume
75
Year of Publication
1999
Issue
9
Pagination
1216-1218
ISSN Number
0003-6951 (print), 1077-3118 (online)
Short Title
Appl. Phys. Lett.
Keywords
Organizations
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