Bonn 2025 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 12: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)

MO 12.34: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

Aberration correction and trap creation in a dipolar quantum gas microscope — •Michael Wischert¹, Kevin Ng¹, Fiona Hellstern¹, Paul Uerlings¹, Alexandra Köpf¹, Tanishi Verma¹, Stephan Welte², Ralf Klemt¹, and Tilman Pfau¹ — ¹5. Physikalisches Institut and Center for Integrated Quantum Science and Technology — ²5. Physikalisches Institut, Center for Integrated Quantum Science and Technology and CZS Center QPhoton, Universität Stuttgart

This poster focuses on calibrating and correcting optical aberrations as well as holographically projecting optical traps for a dipolar quantum gas microscope. To achieve large nearest-neighbor interactions (200 Hz at 10 nK), a 180 nm spaced near-UV lattice with dysprosium atoms will be used. This setup requires a high NA objective (NA 0.9) where minimizing imaging aberrations is critical for maintaining image fidelity. To mitigate these aberrations, we introduce a spatial light modulator (SLM) after the objective, enabling phase manipulation of the collected light and correction of the distorted wavefront. We test and compare different methods for calibrating and correcting aberrations using the SLM. Additionally, we explore the use of the SLM in creating tailored optical trap potentials by projecting and analyzing various trap geometries in a separate setup. Our work aims at exploring how SLMs can be utilized to improve imaging performance in quantum gas microscopes.

Keywords: quantum gas microscope; dysprosium; Hubbard model