Berlin 2001 – scientific programme

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K: Kurzzeitphysik

K 1: Short time-scale dynamics and diagnostics

K 1.3: Talk

Monday, April 2, 2001, 17:05–17:20, EB107

Dynamics of femtosecond laser ablation studied by time- and > space-resolved optical interferometry — •Vasily V. Temnov^1,2, Klaus Sokolowski-Tinten¹, and Dietrich von der Linde¹ — ¹Institut für Laser- und Plasmaphysik, Universität > Essen, > D-45117 Essen, Germany — ²Institute of Applied Physics, 603600 Nizhny Novgorod, Ulyanova St. 46, Russia

> The dynamics of laser ablation of solids by ultrashort pulses is > studied by means of time- and space-resolved optical > interferometry. The technique allows detection of transient > surface deformations in a range of a few nanometers with a > temporal resolution of about 100 femtoseconds. Close to the > ablation threshold we observe the formation of a sharp ablation > front towards vacuum with typical expansion velocities of about > 100-1000 m/s, in accordance with previously reported results [1]. > In particular we compare the behavior below and above the > ablation threshold. > [1] K. Sokolowski-Tinten et. al., Phys. Rev. Lett. 81, 224 > (1998) >