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Surface Modification of Metallic Targets with Ultrashort Laser Pulses
- Source :
- Acta Physica Polonica A, Scopus-Elsevier
- Publication Year :
- 2009
-
Abstract
- Interaction of pulsed femtosecond Ti:sapphire laser (160 fs), operating at high repetition rate (75 MHz) at 800 nm, with nickel-based superalloy Inconel 600 and tungsten-titanium (WTi) target was studied. The WTi target was in form of thin film deposited on silicon substrate. Low laser fluence of maximum 50 mJ/cm(2) had modified the target surface during irradiation/exposure time of seconds or minutes. The radiation absorbed from the laser beam generates at the surface a series of effects, such as direct material vaporization, formation of clusters, etc. Morphological features of the targets can be summarized as: (a) intensive removal of material and crater appearance; (b) creation of nanostructures; (c) microcracking, etc. Ablation of Inconel 600 surface is effective, resulting in formation of holes with small diameter ( LT = 10 mu m) and relatively large depth ( LT = 50 mu m). In case of WTi target/thin film, the surrounding rim is not so expressed, and crater depths are lower. It can be concluded that the average laser power of the order of watts, pulse energies of the order of nanojoules and high repetition rates (MHz range) can successfully modify metallic materials. International School and Conference on Photonics (PHOTONICA09), Aug 24-28, 2009, Belgrade, Serbia
- Subjects :
- Materials science
business.industry
Ti:sapphire laser
General Physics and Astronomy
Substrate (electronics)
Laser
01 natural sciences
Fluence
010305 fluids & plasmas
law.invention
X-ray laser
Optics
law
0103 physical sciences
Femtosecond
Laser power scaling
Thin film
010306 general physics
business
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Acta Physica Polonica A, Scopus-Elsevier
- Accession number :
- edsair.doi.dedup.....5d17c77fa2204cc460a12c147d1f8853