Regensburg 2007 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 37: Nano structured materials V

MM 37.4: Talk

Thursday, March 29, 2007, 17:30–17:45, H4

Nanoscale ablation induced by laser near-field — •Anton Plech¹, Vassilios Kotaidis¹, Maciej Lorenc², Konstantin Istomin¹, and Johannes Boneberg¹ — ¹Fachbereich Physik, Uni Konstanz, Universitätsstr. 10, D-78457 Konstanz — ²ESRF, BP 220, F-38043 Grenoble; present address: GMCM, Universite Rennes 1, Bat. 11A, Campus Beaulieu, F-35042 Rennes

Experiments on femtosecond laser excited gold nanoparticles are presented and it is shown, that the structure formation of the particles is induced by a non-thermal ablation process, which is induced by the strong local enhancement of the laser field close to the particle surface [1]. Time-resolved x-ray scattering allowed to discriminate the structural manifestations of the excitation process, such as particle heating, melting and relaxation with the environment [2].

[1] A. Plech, V. Kotaidis, M. Lorenc, J. Boneberg: Femtosecond laser near-field ablation from gold nanoparticles, Nature Phys. 2 (2006) 44.

[2] V. Kotaidis, C. Dahmen, G. von Plessen, F. Springer, A. Plech: Excitation of nanoscale vapor bubbles at the surface of gold nanoparticles in water, J. Chem. Phys., 124, (2006) 184702.