Regensburg 2007 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 11: Poster Session

DF 11.15: Poster

Donnerstag, 29. März 2007, 14:30–18:00, Poster C

The influence of elliptical polarization on self-organized nanostructures upon femtosecond laser ablation — •Olga Varlamova^1,2, Guobin Jia², and Juergen Reif^1,2 — ¹LS Experimentalphysik II, BTU Cottbus, Konrad-Wachsmann-Allee 1, 03046 Cottbus — ²IHP/BTU Joint-Lab, Konrad-Wachsmann-Allee 1, 03046 Cottbus

The orientation of self-organized periodical structures on solid surfaces upon multishot femtosecond laser irradiation is known to depend crucially on the polarization of the incident light. In this contribution, we present a systematic study of this phenomenon, varying the polarization from linear over elliptical to circular. We find that not only the direction but also the coordination length of the structures is strongly influenced by the degree of the ellipticity and the direction of the principal axis. An analysis of the generated structures with Scanning Electron and Atomic Force Microscopy reveals new morphological dependencies, also on the angle of incidence of circularly polarized pulses.