Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster: Ultrafast Electron Dynamics at Surfaces and Interfaces

O 36.20: Poster

Dienstag, 19. März 2024, 18:00–20:00, Poster C

Impact of the CEP of the driving pulses on High-order Harmonic Generation — •Katrin Meier, Lina Hansen, Arvid Kloesgen, Kerstin Harland, and Jan Vogelsang — Institut für Physik, Carl von Ossietzky Universität Oldenburg, 26129 Oldenburg, Germany

The nonlinear process of High-order Harmonic Generation (HHG) is a method of generating ultrashort pulses in the extreme ultraviolet spectral range. They are of great interest to researchers because they can be used, for example, to probe ultrafast electron dynamics in various structures.

In this work, a home-built laser system is used that delivers ultrashort laser pulses centred around 2000 nm. The intense few-cycle near-infrared pulses are focused into a specially designed gas target where high harmonics of the driving laser field are generated. The carrier-envelope phase (CEP) of the driving pulses is measured with an f-to-2f interferometer. The focus of the work is on the influence of the CEP on the HHG spectrum and the corresponding temporal pulse structure.

Keywords: High-order Harmonic Generation; HHG; XUV; Carrier-Envelope Phase; f-to-2f-Interferometer