Abstract
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. © 2001 American Institute of Physics.
| Original language | English |
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| Pages (from-to) | 2516-2519 |
| Number of pages | 3 |
| Journal | Journal of Applied Physics |
| Volume | 89 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Mar 2001 |
Keywords
- Electric field effects; Holographic recording materials; Photorefractive effect; Photorefractive materials (effect of field-dependent photogeneration on holog. contrast in photorefractive polymer composites); Electric current carriers (photocarriers; effect of field-dependent photogeneration on holog. contrast in photorefractive polymer composites)