Prof. Juergen Klepp: Observation of neutron Pendellösung interference in holographic nanostructures
Source: Monday physics colloquium
Observation of neutron Pendellösung interference in holographic nanostructures
Prof. Juergen Klepp
Faculty of Physics, University of Vienna, 1090 Vienna, Austria
We aim at advancing neutron optics for improving established techniques and developing novel methods of neutron scattering, diffraction and spectroscopy. For that purpose, we employ nanoparticle-polymer composite grating-structures fabricated by optical holography. Previous experiments with such gratings have demonstrated how they can be used as (multi-port) beam-splitters or mirrors for cold and very-cold neutrons. In recent experiments, we have observed the Pendellösung interference effect, the oscillation of intensity between the diffracted and the forward-diffracted beam due to internal interference in periodic potentials such as crystals or holographic nanostructures. The results pave the way for applications like small-size and cheap polarizing beam-splitters for small-angle neutron scattering.