Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 53: Poster: Quantum Optics and Photonics III

Q 53.32: Poster

Donnerstag, 9. März 2017, 17:00–19:00, P OG2

Superconducting coherent electron beam sources and a compact matter wave interferometer for sensor applications — •Nicole Kerker, Andreas Pooch, Georg Schütz, Michael Seidling, Moritz Layer, Nicolas Seitz, and Alexander Stibor — University of Tübingen, Physical Institute, Quantum Electron - & Ion - Interferometry

In interferometry significant developments of novel techniques where made. They include coherent single atom tip field emitters or delay line detectors with high spatial and temporal resolution which allows correlation analysis. These techniques can be applied in electron interferometry to construct sensors with high sensitivity for rotations or the spectroscopy of vibrational and electromagnetic frequencies. The realization of such a sensor requires a highly coherent and intensive electron field emission source and a compact, robust and portable electron interferometer. Here, we present new developments towards these goals. Increasing electron beam coherence by simultaneously remaining a high intensity can in principle be achieved using niobium tips. Niobium gets superconducting below a temperature of 9.2 K and it has been demonstrated in the literature that the energy spread of the emitted electrons in this regime decreases significantly. We show first results in the preparation of such tips and the characterization of their field emission behavior. We present the design and realization of a compact and robust electron biprism interferometer. The setup can potentially be applied to realize a portable interferometer to test the coherent properties of novel beam emitters and for sensor applications.