Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 26: Poster – Ultrashort Pulses and Strong Fields (joint session K/Q)
Q 26.14: Poster
Dienstag, 3. März 2026, 17:00–19:00, Philo 1. OG
New light in the lab for single-particle imaging experiments — •Jasper Boultwood1, Indrani Dey1, Frederic Ussling1, José Gómez Torres1, Yves Acremann2, Alessandro Colombo1, Linos Hecht1, Isabelle Bollier1, Ehsan Hassanpour Yesagi1, Jannis Lehmann2, Katharina Kolatzki1, Mirjam Kunz1, Mario Sauppe1, Angela Vidoni1, Simon Wächter1, Björn Senfftleben1, and Daniela Rupp1 — 1Nanostructures and Ultrafast Science, ETH Zürich — 2D-PHYS, ETH Zürich
Lab-based coherent diffraction imaging (CDI) of free-flying isolated nanoparticles has only recently become feasible and opens up new research opportunities. Short-wavelength pulses focused to high intensities are required, which are connected to rather extreme conditions for the high-harmonic generation (HHG) process. We investigate the use of different focusing geometries and driving wavelengths to optimize XUV pulse generation from a high-power NIR laser amplifyer (800 nm, 20 mJ, 30 fs). Interestingly, XUV generation in a Xenon gas cell using a 400 nm driving wavelength from second harmonic generation (SHG) in a BBO crystal results in the production of a single harmonic instead of four harmonics typical for an 800 nm driver. This single-line output is of interest for CDI applications as monochromatic diffraction creates clearer interference structures.
Keywords: High Harmonic Generation; Second Harmonic Generation; XUV Generation; Coherent Diffraction Imaging