Title :
Effect of Surface Structural Modifications on Absorptivity of Platinum in Multi-Pulse Femtosecond Laser Ablation
Author :
Vorobyev, A.Y. ; Guo, Chunlei
Author_Institution :
Inst. of Opt., Rochester Univ., NY
fDate :
June 29 2006-July 1 2006
Abstract :
Change in absorptivity of platinum caused by surface modifications in multi-pulse femtosecond laser ablation is studied as a function of the number of applied laser pulses at various values of laser fluence and ambient gas pressure. We show that laser-induced surface modifications enhance significantly the absorptivity due to nano-, micro-, macro-structures produced by ablation. At a sufficiently high fluence and large number of applied pulses the absorptance of ablated platinum surface can reach a value close to 100%. The absorptivity enhancement caused by surface structural modifications produced by ablation in vacuum is greater then that in air
Keywords :
high-speed optical techniques; laser ablation; platinum; surface structure; Pt; absorptivity; laser fluence; multipulse femtosecond laser ablation; platinum; surface structural modifications; Gas lasers; Laser ablation; Laser transitions; Optical pulses; Optical surface waves; Platinum; Pulse measurements; Surface emitting lasers; Surface morphology; Ultrafast optics; ablation; absorptivity; femtosecond laser; materials processing; metals;
Conference_Titel :
Laser and Fiber-Optical Networks Modeling, 8-th International Conference on
Conference_Location :
Kharkiv
Print_ISBN :
1-4244-0233-6
Electronic_ISBN :
1-4244-0234-4
DOI :
10.1109/LFNM.2006.251972
