title: Temporal evolution of the angular response of a holographic diffraction grating in PVA/acrylamide photopolymer.
abstract: In this paper we evaluate the temporal evolution, after exposure, of a diffraction grating stored in a PVA/acrylamide photopolymer. We also study the overmodulation of the refractive index inside the hologram, which gives rise to a particular behaviour of the angular response of diffraction efficiency. This evolution takes place in our photopolymer due to the incorporation of dimethylacrylamide (DMAA), which is a liquid at room temperature and so favours diffusion of the species in solution from the zones of greater concentration to those of lower concentration.
authors.forename: S
authors.initials: S
authors.lastname: Gallego
authors.forename: M
authors.initials: M
authors.lastname: Ortuno
authors.forename: C
authors.initials: C
authors.lastname: Neipp
authors.forename: C
authors.initials: C
authors.lastname: Garcia
authors.forename: A
authors.initials: A
authors.lastname: Belendez
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Pascual