Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Ultra-cold atoms, ions and BEC
A 12.23: Poster
Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik
Ultracold and Ultrafast: Probing Quantum Gases with Femtosecond Laser Pulses — •Mario Neundorf1,2, Tobias Kroker1,2, Bernhard Ruff1,2, Donika Imeri1, Philipp Wessels1,2, Markus Drescher1,2, Klaus Sengstock1,2, and Juliette Simonet1,2 — 1Zentrum für Optische Quantentechnologien (ZOQ), Luruper Chaussee 149, 22761 Hamburg — 2The Hamburg Centre for Ultrafast Imaging (CUI), Luruper Chaussee 149, 22761 Hamburg
Combining ultracold atoms with ultrashort laser pulses offers novel experimental possibilities such as the instantaneous creation of hybrid quantum systems by local ionization of quantum gases.
Here we present a quantum gas machine allowing to simultaneously detect atoms, electrons and ions after photoionization of ultracold gases. After evaporative cooling in a combined magnetic quadrupole and dipole trap, the ultracold atomic gas is transferred into the interaction region by optical transport within 1.7 seconds.
A femtosecond laser beam with actively stabilized beam pointing is focused down to 1 µm allowing for local ionization of Bose-Einstein condensates in a crossed dipole trap.
High-speed micro-channel plate and phosphor screen detectors surround the interaction region. To reduce external perturbations on the photoelectron trajectories, an active magnetic field compensation has been set up.