High-sensitive holographic storage in Ce-doped SBN

Abstract

High optical sensitivity is observed in 0.1 wt% Ce-doped strontium barium niobate (SBN) crystals in the absence of an external electric field. Only 5–10 mJ/cm2 of incident 0.488-μm radiation is required to produce 10% diffraction efficiency, while the energy to erase holograms from the 80% to its 1/e diffraction efficiency level is 30–40 mJ/cm2 at the same wavelength. Holograms stored in Ce-doped SBN persist at least one month (decay time constant) if kept in the dark at room temperature.

Kinetics of light‐induced polaron‐ and VIS‐centers in SBN:Ce single crystals at low temperature

“…These characteristics in both structure and composition provide great possibilities for SBN to accommodate a wide range of dopants, making it possible to tailor the photorefractive properties of SBN. Doping with polyvalent ion like Ce can enhance the photorefractive properties of SBN [4,5]. For Ce in SBN a majority charge state 3+ has been determined [6], Ce 3+ ions have been found to replace mainly Sr 2+ ions [7].…”

Role of cerium in lithium niobate for holographic recording

“…9,10 Ce-doped SBN has a very high sensitivity at visible wavelength, 8 and Cedoped BaTiO 3 is sensitive to both visible and near infrared light. 9,10 Some previous reports on Ce and Fe doubly doped LiNbO 3 suggest that this material has a wide spectral response and shows higher sensitivity.…”

Absorption spectroscopy and energy levels of rare earth impurity centres in Srx Ba1–xNb2O6 crystals

“…lithium niobate crystals. Namely Ce doping was found to increase the photorefractive sensitivity in the visible region by two orders of magnitude in comparison with pure SBN crystals [2,3]. Hence, regarding photorefractive applications of this material it is important to know optical properties and parameters of other possible rare earth impurity centres in the crystal lattice of SBN of congruent or nearly congruent composition.…”