Recording and thermo developing of latent phase holograms in the photosensitive polymer material based on anthracylacetonatoboron difluoride

Abstract

The diffraction efficiency of photoinduced gratings recorded in polymethylmethacrylate doped with anthracylacetonatoboron difluoride was shown to be increased from 8% to 70% due to the post-exposure heating of the material to 75°C. Mechanism of the thermal development was determined to be the diffusion of the initial photoactive additives molecules and the photoproduct. This process shifts the minimum of the material frequency-contrast characteristic into the low-frequency region as well as significantly increases the amplitude of the refractive index modulation for gratings with the spatial frequencies up to 2500mm−1.