Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 61: Poster Quanteneffekte
Q 61.5: Poster
Donnerstag, 22. März 2007, 16:30–18:30, Poster C
Casimir Forces and nano-crafted surfaces — Lodewijk Arntzen, Maarten DeKieviet, Felix Laux, and •Ulrich Warring — Physikalisches Institut der Universität, Philosophenweg 12, D-69120 Heidelberg
In the Heidelberger Atomic Beam Spin Echo (ABSE) spectrometer, we have recently succeeded to detect Quantum Reflection (QR) of 3He atoms from plain and well-characterized surfaces. For semi-conductors, we find that QR takes place at the transition from the van der Waals dominated part of the interaction potential to the Casimir-Polder part. In order to investigate the topological aspects of the Casimir-Polder force, we studied QR from different gratings. Depending on the shape and the orientation of these nano-structures, changes in the reflected intensity and the angular-distribution were observed. Quantitatively, the data are explained by vertical and lateral Casimir-Polder forces.