Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie

Q 57.58: Poster

Donnerstag, 17. März 2011, 16:30–19:30, P1

Microwave guiding of electrons in a planar Paul trap — •Roman Fröhlich, Johannes Hoffrogge, Jakob Hammer, and Peter Hommelhoff — Max-Planck-Institut für Quantenoptik, Hans- Kopfermann-Straße 1, 85748 Garching bei München

We present an experiment demonstrating the guiding of electrons in a linear Paul trap [1]. The trapping potential is generated by a microstructured planar electrode geometry. The trap is driven at frequencies of around 1 GHz, leading to trap frequencies of about 150 MHz. In comparison to the confinement of ions much higher driving frequencies are necessary because of the higher charge to mass ratio of electrons. We show that guiding works over a range of electron energies from 1eV to 5eV and characterize the effect of substrate charging on the guiding properties. We also investigated the effect of trap stability and depth over a wide range of driving frequencies and voltages. Furthermore we present second generation substrates with high aspect ratio and more complex trap electrode structures, fabricated by thick film lithography. This includes beam splitters and electrically long structures. These devices together with coherent electron emitters like single atom tips may enable applications such as guided electron interferometry.
J. Hoffrogge, R. Fröhlich and P. Hommelhoff - submitted (2010)