Intensity dependent photorefractive properties of BaTiO3
作者:
Doyle A. Temple,
R. Scott Hathcock,
Cardinal Warde,
期刊:
Journal of Applied Physics
(AIP Available online 1990)
卷期:
Volume 67,
issue 11
页码: 6667-6670
ISSN:0021-8979
年代: 1990
DOI:10.1063/1.345101
出版商: AIP
数据来源: AIP
摘要:
We have used the light‐induced grating erasure technique to measure the photorefractive properties of pure and iron doped BaTiO3. Our experiments were performed using an anisotropic configuration which forbids beam coupling and self‐diffraction between the writing beams, resulting in plane parallel intensity fringes that do not change with time. This allowed direct measurement of the charge transport processes without any feedback on the grating due to wave‐mixing processes. The results from these experiments show that the photorefractive parameters known as the trap densityNprand the mobility‐recombination time product &mgr;&tgr;r, vary with intensity and are not material constants.
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