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K: Fachverband Kurzzeit- und angewandte Laserphysik

K 6: Poster

K 6.2: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

Time-, space- and spectral-resolved characterization of the ablation plume generated with ultrafast laser radiation — •Phillip Börner, Markus Olbrich, Andy Engel, and Alexander Horn — Laserinstitut Hochschule Mittweida, 09648 Mittweida, Germany

The knowledge of the size and density of the ablation plume generated by ultrafast laser radiation represents a key parameter to understand the interaction of multi-pulsed ultrafast laser radiation with matter particularly in the case of applying bursts of ultrafast laser radiation with pulse separation times of several 100 ps up to a few ns within the burst. A complementary experimental setup combining pump-probe imaging reflectometry, interferometry, and spectroscopy is presented. This setup enables the measurement of space- and spectral-resolved changes in intensity over time, allowing the calculation of changes in the optical properties and geometrical shape of the material surface as well as of the induced ablation plume. Based on these changes, the excitation of the electron system and the generation of the ablation plume is determined by reflectometry and interferometry within the first nanoseconds after the irradiation. The emission of the ablation plume is measured by the combination of an imaging spectrograph coupled with an em-ICCD camera for later timescales. Therefore, this setup enables a detailed understanding of laser-matter-interaction, especially in describing the ablation plume.

Keywords: reflectometry; interferometry; spectroscopy; laser radiation-matter-interaction