Holographic gratings for cold neutron optics
  We discuss the applicability of holographically patterned polymers, polymer dispersed liquid crystals, and nanoparticle-polymer composites as optical elements for cold neutrons. Requirements concerning the spacing, thickness or strength of the grating for certain types of neutron optical elements, e.g., 2-port or 3-port beamsplitters, are discussed in the framework of a rigorous coupled-wave analysis. Finally, a roadmap to neutron mirrors, e.g., for interferometers, is drawn. 
Martin Fally, Juergen Klepp, Christian Pruner, Yasuo Tomita, Helmut   Eckerlebe, Joachim Kohlbrecher, Romano A. Rupp
cond-mat.soft physics.optics