Bonn 2025 – scientific programme

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A: Fachverband Atomphysik

A 11: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)

A 11.20: Poster

Tuesday, March 11, 2025, 14:00–16:00, Tent

Programmable Optical Lattices for Quantum Gas Microscopy — •Tom Schubert¹, Isabelle Safa¹, Sarah Waddington¹, Rodrigo Rosa-Medina¹, and Julian Léonard^1,2 — ¹Atominstitut, Technische Universität Wien, Austria — ²Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria

Creating tailored optical potentials on demand is crucial for quantum simulation experiments with ultracold atoms, supporting the exploration of diverse strongly correlated phenomena, such as magnetic frustration or topological order. In this poster, we present the design and projection of tuneable lattice potentials using holographic beam shaping methods, combined with precise corrections of optical aberrations. The corrections and projection of the potentials are achieved employing a Digital Micromirror Device (DMD) and a Spatial Light Modulator (SLM), which facilitate phase and amplitude modulation through the use of programmable diffraction gratings. Through the correction process, we enable phase correction of wavefront aberrations with resolutions on the order of λ/100. For shaping the corrected beam into the desired optical lattices, we implement different holographic projection methods, including basic Fourier Transform and the Gerchberg-Saxton algorithm, and analyze their performance. Further we implemented a versatile experiment control system (ARTIQ), employing FPGA hardware, facilitating real-time manual control of the SLM-DMD structure. As a result, we are able to implement a variety of optical potentials, ranging from lattices in box-shape potentials to linearly tilted superlattices.

Keywords: Optical Lattices; Digitial Micromirror Device; Beamshaping; Quantum Gas Microscopy