Title :
Femtosecond laser ablation: imaging expansion dynamics of the plasma
Author :
Albert, O. ; Etchepare, J. ; Loulergue, J.C. ; Perriere, J. ; Millon, E. ; Le Menn, E. ; Boulmer-Leborgne, C.
Author_Institution :
Ecole Polytech., Palaiseau, France
Abstract :
Summary form only given. The expansion dynamic of plasma produced by femtosecond laser ablation of different materials has been studied with a time resolved CCD camera in the UV-visible range. About 1 mJ energy of a laser operating at 620nm issued from an amplified femtosecond CPM dye laser is focused (focusing diameter:0.5 mm) onto a rotating-target. The laser pulse width can be tuned from femtosecond to picosecond and nanosecond duration. In the femtosecond pulse regime the plume behavior is linked to physical properties of the target. Time resolved analysis of the plasma plume from 10 nanoseconds to several milliseconds, indicates that several populations of species are ejected from the target. The pulsed laser deposited (PLD) films are strongly influenced by the nature and kinetic energy of the species reaching the substrate. This issue will be highlighted in the precise case of the femtosecond PLD of BaTiO/sub 3/.
Keywords :
CCD image sensors; barium compounds; high-speed optical techniques; plasma diagnostics; plasma production by laser; pulsed laser deposition; 0.5 mm; 1 mJ; 10 ns; 620 nm; BaTiO/sub 3/; UV-visible range; amplified femtosecond CPM dye laser; femtosecond PLD; femtosecond laser ablation; femtosecond pulse regime; kinetic energy; laser pulse width; plasma expansion dynamics imaging; plasma plume; plume behavior; pulsed laser deposition; substrate; thin films; time resolved CCD camera; Energy resolution; Focusing; Laser ablation; Laser theory; Laser tuning; Optical materials; Optical pulses; Plasma materials processing; Pulse amplifiers; Pulsed laser deposition;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
DOI :
10.1109/CLEO.2001.947817
