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MO: Fachverband Molekülphysik
MO 6: Molecular Spectroscopy of Liquid Jets II
MO 6.7: Vortrag
Dienstag, 11. März 2025, 12:30–12:45, HS XV
Field Resolved Spectroscopy of flat liquid sheets — •Kilian Scheffter1,2, Anchit Srivastava1,2, Andreas Herbst1,2, Soyeon Jun1,2, and Hanieh Fattahi1,2 — 1Max Planck Institute for the Science of Light, Erlangen, Germany — 2Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
We present femtosecond fieldoscopy at near-petahertz frequencies in flat liquid sheets. The interaction between femtosecond optical pulses and molecules in a sample results in the imprint of a molecular response on the electric field of the excitation pulses. By resolving the electric field of the transmitted pulses with attosecond precision, we achieve broadband background-free spectroscopic detection of molecules with high dynamic range and sensitivity. In liquid-phase measurements, the container's material often introduces absorption, dispersion, birefringence and nonlinearity, which limits the detection sensitivity. To overcome these challenges, we developed a 3D printed nozzle capable of producing micrometer thick liquid sheets, enabling direct spectroscopic measurements of liquids. This talk will present the integration of the liquid jet into field-resolved spectroscopy, allowing for the measurement of Raman, overtone, and combination bands of liquid samples across the entire fingerprint region.
Keywords: fieldoscopy; femtosecond field-resolved spectroscopy; ultrafast spectroscopy; liquid jet