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During the last decade a number of volume holographic media have beeninvestigated that could serve not only as diffractive optical elements (DOEs)for light but also for slow neutrons. In this contribution we discuss the lightoptical properties of a stack of two gratings separated by an optically inertslice recorded in a Bayfol HX photopolymer. While the refractive-indexmodulation of the gratings for light is remarkable, the corresponding neutronoptical analogue is, so far, in the medium range of other materialsinvestigated. We therefore aim at possible improvements which are discussed inthis manuscript.

Multilayer volume holographic gratings from Bayfol HX: light and neutron optical characteristics