Improvement of the photorefractive efficiency of BaTiO3 by γ irradiation
- 26 October 1992
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 61 (17) , 2015-2017
- https://doi.org/10.1063/1.108344
Abstract
We report that the photorefractive response of as‐grown BaTiO3 crystals can be improved by γ irradiation from a Co60 source. An increase in photorefractive response was observed with irradiation doses exceeding 106 rad, with a maximum observed increase in two‐beam coupling gain of ∼15%. We interpret our results within the context of a well‐known model of photorefractivity in BaTiO3 and conclude that γ irradiation increases the effective trap density and possibly also increases the normalized conductivity in samples where both holes and electrons contribute to photorefractivity.Keywords
This publication has 9 references indexed in Scilit:
- Clamped–unclamped electro-optic coefficient dilemma in photorefractive phenomenaOptics Letters, 1991
- Simultaneous electron/hole transport in photorefractive materialsJournal of Applied Physics, 1986
- Hole–electron competition in photorefractive gratingsOptics Letters, 1986
- Photorefractive effect in BaTiO_3: microscopic originsJournal of the Optical Society of America B, 1986
- Altering the photorefractive properties of BaTiO_3 by reduction and oxidation at 650°CJournal of the Optical Society of America B, 1986
- Beam coupling in BaTiO3 at 442 nmJournal of Applied Physics, 1985
- ESR and Optical Studies of Impurity Centres in γ‐ and X‐Irradiated LiNbO3Physica Status Solidi (b), 1982
- Diffraction efficiency and energy transfer in two-wave mixing experiments with Bi12SiO20 crystalsApplied Physics A, 1981
- Holographic storage in electrooptic crystals. i. steady stateFerroelectrics, 1978