Berlin 2001 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

A: Atomphysik

A 16: Cooling and Trapping V (joint session A and Q)

A 16.1: Vortrag

Donnerstag, 5. April 2001, 17:30–17:45, H104

A deterministic source of cold atoms — •Dominik Schrader, Stefan Kuhr, Wolfgang Alt, Martin Müller, Victor Gomer, and Dieter Meschede — Universität Bonn, Institut für Angewandte Physik, Wegelerstraße 8, D-53115 Bonn

We transport a prescribed number of neutral atoms over distances of some millimeters with micrometer precision.

A desired number of cold cesium atoms is prepared in a magneto-optical trap. The atoms are then transferred into a red detuned optical dipole trap made of two counterpropagating Nd:YAG laser beams forming a standing wave.

When the laser beam frequencies are detuned with respect to each other by means of acousto-optical modulators, the standing wave pattern starts to move, carrying the atom along with it. By applying suitable frequency ramps we accelerate and decelerate the atoms, moving them by up to 2.5 mm.

The setup represents a deterministic source of cold atoms, delivering a desired number of atoms at a certain time to a desired place.