Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 50: Poster Ultrakalte Atome

Q 50.17: Poster

Thursday, March 13, 2008, 16:30–19:00, Poster C2

Methods for High-Resolution Preparation of Bose-Einstein Condensates with Spatial Light Modulators — •Simon Stellmer, Mathis Baumert, Christoph Becker, Parvis Soltan-Panahi, Jochen Kronjäger, Kai Bongs, and Klaus Sengstock — Institut für Laserphysik, Uni Hamburg, Germany

The use of Spatial Light Modulators (SLM) has developed into a common technique in the past years. The field of application ranges from biological use in the form of optical tweezers to optical manipulation of Bose-Einstein condensates. Splitting and transport of BECs [1] has been demonstrated, as well as the generation of oscillating solitons [2] and the observation of Josephson junctions in ultra-cold atoms [3].

Here we present a method to manipulate BECs with an extraordinary high spatial resolution, leading e.g. to the generation of solitons in Bose-Einstein condensates. We achieve the accuracy by imaging computer generated structures on a spatial light modulator onto the BEC.

Additional preparation methods are discussed regarding resolution and feasibility. We present holographic imaging in divergent laser beams allowing for an optical set-up with extremely high numerical aperture and therefore high resolution. Furthermore, we report on the possibilities of generating non-diffractive Bessel beams which may be employed in transport of atoms within quantum registers and atom guiding within photonic band gap fibres.

[1] V. Boyer et al., Phys. Rev. A 73, 031402 (2006)

[2] C. Becker et al., to be published

[3] S. Levy et al., Nature 449, 579 (2007)