Dresden 2011 – scientific programme

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A: Fachverband Atomphysik

A 26: Poster III

A 26.74: Poster

Thursday, March 17, 2011, 16:00–18:30, P2

A study of CPT resonances in an optical dipole trap — •Carl Basler, Alexander Lambrecht, Florian Meinert, and Hanspeter Helm — Physikalisches Institut, Universität Freiburg, Germany

A table-top atomic clock based on coherent population trapping (CPT) resonances with parallel linearly polarized optical fields in a vapor cell has recently been demonstrated on the D1 line of Rb87[1]. We study this transition with counter-propagating laser beams in an optical dipole trap. One goal is to explore the suitability of this transition for an all optical path to continuous generation of low temperature trapped atom samples using the proposed EIT-cooling scheme [2,3]. Due to the low trapping frequencies which can be realized for neutral atoms, a magnetic-field insensitive CPT resonance transition appears paramount to success. A second attractive feature of this transition is the high contrast of the resonance amplitude[1]. The experiment is carried out using two externally phase-locked diode lasers and a crossed CO2 laser dipole trap which is loaded from a 2D-MOT. Research supported by Research supported by DFG HE2525/7

1 E. E. Mikhailov et al.

2 C. Morigi, Phys. Rev. A. 67 033402 (2003)

3 M. Roghani et al. Phys. Rev. A 81 033418 (2010)