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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie

Q 57.7: Poster

Thursday, March 17, 2011, 16:30–19:30, P1

Dipole potentials for guided atom-optics — •Thomas Lauber, Johannes Küber, Martin Hasch, Oliver Wille, and Gerhard Birkl — Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt

We present our approach towards integrated atom-optics, which is based on the implementation of micro-fabricated optical elements for the shaping of dipole potentials. These elements are available in various designs like cylindrical lens arrays or a ring lens. They provide the advantage that the resulting light fields can be easily combined to create complex structures, like beam splitters or Mach-Zehnder like interferometers. The ring lens, which offers a toroidal trapping potential, is currently investigated. We present first experiments with a Bose-Einstein condensate loaded to and accelerated in linear wave guides and the ring shaped dipole potential.

For these experiments we use a BEC which is prepared all-optically in a crossed dipole trap generated by a 1070nm fibre laser. For coherent splitting and acceleration of the atoms we use a one-dimensional optical lattice. With this setup we are able to perform interferometric experiments for characterisation of the coherence properties in a wave guide.

We further show a possible scheme for an atom matter wave resonator with tunable mirror transmittance, which reveals long lifetimes and specific revival dynamics.