Stabilized photorefractive running holograms, with arbitrarily selected phase shift, for material characterization

We report on the recording of stabilized running holograms in photorefractive materials with arbitrarily selected phase shift φ between the transmitted and difracted beams propagating along the same direction behind the photorefractive crystal. The dependence of the diffraction efficiency and of the hologram speed on φ , in such stabilized holograms, can be easily measured and used for material characterization. In this communication we applied for the first time this technique for studying and characterizing hole-electron competition in a nominally undoped titanosillenite crystal sample. © 2012 Optical Society of America OCIS codes: (160.5320) Photorefractive materials; (050.7330) Volume gratings. References and links 1. L. Solymar, D. J. Webb, and A. Grunnet-Jepsen, The Physics and Applications of Photorefractive Materials (Clarendon Press, Oxford, 1996). 2. S. I. Stepanov, V. V. Kulikov, and M. P. Petrov, “Running holograms in photorefractive Bi12TiO20 crystals,” Opt. 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