title: Light-induced phase and amplitude gratings in centrosymmetric Gadolinium Gallium garnet doped with calcium.
abstract: The photosensitive properties of a centrosymmetric gadolinium gallium garnet crystal doped with calcium are investigated at room temperature. Elementary holograms can be recorded over a wide range of wavelengths in the visible spectral range. The photosensitive properties are studied experimentally using beam coupling and angular response experiments. Mixed absorption and refractive-index gratings are observed and their amplitudes and relative phases determined. Moreover, the candidate centers that are responsible for the photorefractive effect are discussed.
authors.forename: Mostafa A
authors.initials: MA
authors.lastname: Ellabban
authors.forename: Martin
authors.initials: M
authors.lastname: Fally
authors.forename: Romano A
authors.initials: RA
authors.lastname: Rupp
authors.forename: László
authors.initials: L
authors.lastname: Kovács