Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 68: Matter Wave Optics I
Q 68.4: Talk
Friday, March 27, 2015, 12:00–12:15, K/HS2
Diffraction of organic molecules at nanostructured gratings: the role of internal properties — •Christian Knobloch1, Christian Brand1, Michele Sclafani2, Thomas Juffmann3, Johannes Fiedler4, Stefan Scheel4, Yigal Lilach5, Ori Cheshnovsky5, and Markus Arndt1 — 1Faculty of Physics, University of Vienna, Austria — 2ICFO Institut de Ciencies Fotoniques, Castelldefels, Spain — 3Department of Physics, Stanford University, USA — 4Institut für Physik,Universität Rostock, Germany — 5School of Chemistry, Tel Aviv University, Israel
Quantum diffraction of matter-waves enhances the possibility to study the interaction between nanofabricated masks and delocalized molecules. To study these effects we use far-field diffraction at material gratings with single molecule resolution [1]. From the interference patters we are able to acquire information about different internal molecular properties. The interaction between the molecule and the walls of the material grating are mostly governed by dispersive forces. Beside that different experimental techniques allow to get knowledge about the polarizability, cross sections and other properties of the particle in the gas phase. Recent experiments in this field point to the importance of the role of permanent static dipole moments. Those are expected to increase the interaction by orders of magnitude and may lead to decoherence effects this way. This is of importance with regard to future quantum experiments with bio-molecules in the gas phase, that mostly exhibit such dipole moments.
[1] T. Juffmann et al., Nat. Nano., 7 (2012)