Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 21: Poster I
Q 21.25: Poster
Dienstag, 9. März 2010, 16:00–19:00, Lichthof
High resolution imaging of an ultracold quantum gas — •Peter Würtz1, Tatjana Gericke1, Andreas Vogler1,2, Fabian Etzold1, Tobias Weber1,2, Frank Markert1, and Herwig Ott1,2 — 1Institut für Physik, Johannes Gutenberg-Universität, Mainz — 2Fachbereich Physik, Technische Universität Kaiserslautern
We describe a detection and manipulation technique based on scanning electron microscopy which allows for the detection of single atoms in a quantum gas with a spatial resolution of better than 150 nm. A focussed electron beam with a FWHM of 100 nm is moved over the atom cloud and ionizes atoms by electron impact ionization. The produced atoms are subsequently extracted and detected.
We produce a 87Rb condensate in a single beam optical dipole trap formed by a focussed CO2 laser beam. We implemented a two-dimensional with 600 nm lattice spacing to study quantum gases in periodic potentials. Our imaging technique enables us not only to resolve single lattice sites but also to remove atoms from selected sites without affecting neighboring sites. The method offers a versatile experimental platform for the in situ study of ultracold quantum gases in various trapping geometries, as well as the study of dissipative manipulations on Bose-Einstein condensates.