Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.20: Poster

Thursday, March 26, 2015, 17:00–19:00, C/Foyer

A Species-Selective Optical Conveyor Belt Lattice for Neutral Cesium Atoms — •Felix Schmidt^{1, 2}, Daniel Mayer^{1, 2}, Michael Bauer¹, Farina Kindermann¹, Tobias Lausch¹, and Artur Widera^{1, 2} — ¹Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Germany — ²Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, 67663 Kaiserslautern, Germany

For experiments with binary mixtures of ultracold quantum gases the ability to control the position as well as the motional states of both atomic species independently is desired. In our experiment, aiming at deterministic doping of ⁸⁷Rubidium (Rb) Bose-Einstein condensates (BEC) with single Cesium (Cs) atoms, we transport the Cs atoms using a conveyor belt formed by a one-dimensional optical lattice.

The lattice is tuned to a wavelength in between the D₁ and D₂ lines of Rb, where the optical dipole potential for Rb vanishes and thereby a species-selective lattice in the so-called tune-out scheme is realized. By slightly detuning the frequency of the counterpropagating beams, that form the lattice, we can carry the Cs over hundreds of micrometres with high reproducability and precision.

Here we report on the characterization of our conveyor belt showing both the deterministic transport of single Cs atoms, and the investigation of the lattice’s influence on the Rb BEC.