Title
On the surface topography of ultrashort laser pulse treated steel surfaces
Author
Vincenc Obona, J.
Ocelík, V.
Skolski, J.Z.P.
Mitko, V.S.
Römer, G.R.B.E.
Huis In't Veld, A.J.
de Hosson, J.T.M.
Publication year
2011
Abstract
This paper concentrates on observations of the surface topography by scanning electron microscopy (SEM) on alloyed and stainless steels samples treated by ultrashort laser pulses with duration of 210 fs and 6.7 ps. Globular-like and jet-like objects were found depending on the various levels of the fluence applied. It is shown that these features appear due to solid-liquid and liquid-gas transitions within surface layer irradiated by intense laser light. The observations are confronted to the theory of short-pulsed laser light-matter interactions, including interference, excitation of electrons, electron-phonon coupling as well as subsequent ablation. It is shown that the orientation of small ripples does not always depend on the direction of the polarization of laser light. © 2011 Elsevier B.V. All rights reserved.
Subject
Mechatronics, Mechanics & Materials
TFT - Thin Film Technology
TS - Technical Sciences
Materials
Industrial Innovation
Bubbles
Jets
Ripples
Scanning electron microscopy
Ultra fast laser nano-machining
Ultrashort laser pulses
Electron phonon couplings
Fluences
Intense laser
Laser lights
Light-matter interactions
Liquid gas transition
Ripples
Scanning electrons
Short-pulsed laser
Solid-liquid
Steel surface
Surface layers
Ultra-fast
Ultrashort laser pulse
Bubbles (in fluids)
Electrons
Jets
Laser excitation
Laser theory
Liquids
Phonons
Pulse generators
Scanning electron microscopy
Stainless steel
Surface topography
Ultrashort pulses
Pulsed lasers
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TNO identifier
445718
ISSN
0169-4332
Source
Applied Surface Science, 258 (4), 1555-1560
Document type
article