Hannover 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 35: Poster I
Q 35.99: Poster
Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof
A miniaturized electron gun for microwave electron guiding — •Dominik Ehberger1, Jakob Hammer1, Johannes Hoffrogge1, and Peter Hommelhoff1,2 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching — 2Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen
The realization of microwave guiding structures for electrons on micro-fabricated chips [1] enables new experiments in the context of guided matter-wave interferometry and controlled electron-electron or electron-surface interaction studies.
In addition to the spatial confinement of electrons guided in a planar AC-quadrupole guide (linear Paul trap), temporal control is feasible by implementation of a laser-based electron gun. Short blue laser pulses at 400 nm focused on a sharp tungsten tip drive electron emission with high efficiency. Since the emitted electron pulse length and repetition rate are directly linked to the laser pulse length and repetition rate, this set-up is well suited for synchronization with the microwave field. Here we present our ongoing experimental efforts on the realization and characterization of a fast, laser-triggered electron source. Such a miniaturized electron gun in combination with a microwave guide and suitable electron optics should allow tailoring of matter-waves with defined temporal and spatial properties for injection into the guiding potential.
[1] J. Hoffrogge, R. Fröhlich, M. Kasevich and P. Hommelhoff, Phys. Rev. Lett. 106, 193001 (2011).