The field-dependence of the charge photogeneration efficiency reduces the holographic contrast in an organic photorefractive composite. In this article, the Braun model for field-dependent photogeneration efficiency is incorporated into the standard model of photorefractivity. Using this formalism, the effect on the space-charge field, and thereby holographic index contrast, is calculated directly without the need for empirically found parameters. The dependence of the space-charge field on experimental geometry is also analyzed. A powerful description of the effective space-charge field is thus derived and is experimentally verified. This analysis is then used to compare the observed holographic contrast to that predicted from transmission ellipsometry measurements.
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Research Article| March 01 2001
Effect of field-dependent photogeneration on holographic contrast in photorefractive polymers
D. J. Binks;
K. Khand, D. J. Binks, D. P. West; Effect of field-dependent photogeneration on holographic contrast in photorefractive polymers. J. Appl. Phys. 1 March 2001; 89 (5): 2516–2519. https://doi.org/10.1063/1.1342197
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