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A: Fachverband Atomphysik

A 29: Poster: Ultra-cold atoms, ions and BEC (with Q)

A 29.10: Poster

Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof

Single Ions Trapped in a One-Dimensional Optical lattice — •Thomas Huber, Martin Enderlein, Christian Schneider, Alexander Lambrecht, Michael Zugenmaier, Julian Schmidt, and Tobias Schaetz — Albert-Ludwigs Universität Freiburg

In 2010 we trapped a Mg+ ion in an optical dipole trap [1]. Compared to conventional ion traps optically trapped ions permit novel prospects in several ways: For example to study ultra-cold atom-ion collisions, not suffering from micromotion-induced heating [2] and as potentially scalable systems in optical lattices with long-range interaction for quantum simulations based on ions or ions and atoms.

We report on three-dimensional optical trapping of single ions in a one-dimensional optical lattice formed by two counterpropagating laser beams [3]. We characterize the trapping parameters of the standing-wave using the ion as a sensor stored in a hybrid trap consisting of a radio-frequency (rf), a dc, and the optical potential. When loading ions directly from the rf into the standing-wave trap, we observe a domi-nant heating rate. Monte Carlo simulations confirm rf-induced para-metric excitations within the deep optical lattice as the main source. We demonstrate a way around this effect by an alternative transfer protocol which involves an intermediate step of optical confinement in a single-beam trap avoiding the temporal overlap of the standing-wave and the rf field. We discuss potential applications.

[1]Schneider et al., Nat. Photonics 4(2010)

[2]Cormick et al., New J. Phys. 13 (2011)

[3]M. Enderlein et al., Phys. Rev. Lett. 109 (2012)