Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 23: Poster I
Q 23.53: Poster
Tuesday, March 12, 2024, 17:00–19:00, Tent B
High-order harmonic generation in gases with µJ laser pulses — •Matthias Meier1, Philip Dienstbier1, Yuya Morimoto2, Francesco Tani3, and Peter Hommelhoff1 — 1Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany — 2RIKEN Cluster for Pioneering Research (CPR), RIKEN Center for Advanced Photonics (RAP), Japan — 3Max Planck Institute for the Science of Light, 91058 Erlangen, Germany
Applying strong few-cycle pulses in the infrared together with attosecond pulses in the ultraviolet regime in a pump-probe scheme provides a mighty tool for spectroscopy of ultrafast electron dynamics. In order to improve statistics as well as signal-to-noise ratio while keeping the measurement time to a minimum, high repetition rates are desirable. Here, we present a laser system operating at 1 MHz which delivers near infrared 8 fs pulses with an energy of 10 µJ. These pulses drive the process of high-order harmonic generation in an adjacent vacuum chamber where the pulses can furthermore be characterized. The infrared pulses are obtained from shortening 210 fs pulses of an Ytterbium laser amplifier with stable carrier-envelope phase by means of a two-stage compressor based on two argon-filled hollow-core photonic crystal fibers.
Keywords: High-oder harmonic generation; Nonlinear pulse compression; Pump-probe experiment