10.18453/rosdok_id00001997 Fiedler, Johannes Johannes Fiedler http://d-nb.info/gnd/1148770356 Universität Rostock 2017 530 Physics 2017 en http://purl.uni-rostock.de/rosdok/id00001997 urn:nbn:de:gbv:28-diss2017-0161-6 We derive a model describing the Casimir-Polder interaction between a surface and an extended particle. This method can be used to explain matter-wave interference patterns of large organic molecules diffracting at a grating. We reconstruct the interaction from the interference pattern by additional measurements: the phase information encoded in the matter wave is mapped out by an implementation of Hartmann-Shack sensor for neutral matter waves. Together with tomographic reconstruction of the interaction potential, the polarisability of the interfering particle can be estimated.