Light-induced phase and amplitude gratings in centrosymmetric Gadolinium Gallium garnet doped with Calcium Mostafa A. Ellabban1, Martin Fally, Romano A. Rupp Fakult¨at f¨ur Physik, Universit¨at Wien, Boltzmanngasse 5, A-1090 Wien, Austria 1on leave from: Faculty of Science, Tanta University, Egypt Laszl´ oKov´ acs´ Crystal Physics Laboratory, Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 49, Hungary
[email protected] http://nlp.exp.univie.ac.at Abstract: The photosensitive properties of a centrosymmetric gadolin- ium 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 exper- iments. 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. © 2006 Optical Society of America OCIS codes: (090.0090) Holography; (090.7330) Volume holographic gratings; (090.2900) Holographic recording materials. References and links 1. L. Antos, M. Pardavi-Horvath, A. Cziraki, J. Fidler, and P. Skalicky, “Microstructure of Yttrium Iron Garnet Thin Films and of Gadolinium Gallium Garnet Single Crystals,” J. Cryst. Growth 94, 197–02 (1989). 2. A. S. Yurov, A. N. Karpov, V. K. Raev, G. E. Khodenkov, and M. P. Shorygin, “Displacement of a magnetic bubble by a Rayleigh surface wave in an iron garnet film containing bismuth,” Tech. Phys. Lett. 12, 83–4 (1986). 3. R.