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 12.53: Poster

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

Realization and characterization of a tunable 2D optical accordion for ultracold atoms — •Krishnan Sundararajan, Alexander Guthmann, Felix Lang, Louisa Marie Kienesberger, and Artur Widera — Physics Department and Research Center OPTIMAS, University of Kaiserslautern-Landau, Germany

Optical lattices, formed by the interference of coherent laser beams, are powerful tools for manipulating quantum gases. A versatile implementation, the optical "accordion," enables tuneable lattice spacing by adjusting the angle between beams. We aim to develop such a setup using a beam splitter made of custom Dove prisms bonded with UV-curing epoxy, combined with a large aspherical lens. The prism pair splits a single beam into two parallel rays, whose separation depends on the incoming beam properties. Focusing these rays creates an interference pattern forming the lattice potential. We will present the design, assembly, and ex-situ characterization of this optical accordion and its extension to a 2D configuration for accessing lower-dimensional systems with ultracold lithium-6 atoms.

Keywords: Realization; optical; accordion; ultracold; atoms