Planar microwave structures for electron guiding

Details Planar microwave structures for electron guiding Planar microwave structures for electron guiding

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13i5012h&link_type=abstract

New Journal of Physics, Volume 13, Issue 9, pp. 095012 (2011).

Physics

Scientific paper

We present microwave electrode structures suited for guiding electrons propagating in a purely electric, alternating quadrupole field. In a first experiment using a standing wave on an electrically short structure, we previously demonstrated the general concept of electron confinement in microwave fields. Here, we discuss the extension to electrically long structures supporting travelling microwave excitations. This requires a modal decomposition of the voltage patterns on the multiconductor transmission line formed by the electrodes. We show that the use of a general five-wire structure leads to the distortion of the guiding potential upon propagation due to differing modal propagation constants. This can be avoided by implementing a coupled microstrip configuration with elevated signal electrodes. With structures like these, complex geometries connecting different beam manipulation elements can be realized, enabling new forms of electron experiments with guided matter waves.

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