Temporal evolution of the angular response of a holographic diffraction grating in PVA/acrylamide photopolymer.
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.
Gallego
S
S
Ortuno
M
M
Neipp
C
C
Garcia
C
C
Belendez
A
A
Pascual
Inmaculada
I