Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 50: Matter Wave Optics
Q 50.5: Vortrag
Donnerstag, 9. März 2017, 15:30–15:45, P 11
Electric Field Controlled Quantum Reflection — •Benjamin A. Stickler1, A. Ronny Barnea2, Tobias Nitschke1, Uzi Even2, and Klaus Hornberger1 — 1Faculty of Physics, University of Duisburg-Essen, Lotharstraße 1, 47048 Duisburg, Germany — 2School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
We demonstrate that an electric potential can be used to control quantum reflection of matter waves off periodically microstructured surfaces. An alternating voltage applied between neighboring grating bars induces an electric field which serves to modify the interaction between the surface and the impinging atom so that quantum reflection is suppressed. The experimentally measured reflectivities agree with our simulations and the suppressed reflection probability is reproduced by a simple analytic model.