Abstract
We report the studies of the photorefractive properties of the two polymer composites based on poly(N-vinylcarbazole)(PVK). The polymers were obtained by doping PVK with 2,4,7 trinitro-9-fluorenone as a sensitizer agent and two differentazo dyes as nonlinear chromophores. Best results were obtained for the polymer doped with 2,5-dimethyl-4-pnitrophenylazoanisole, which showed a maximum diffraction efficiency of 34% at 40 V/pm external electric field strengthin 105 tm thick samples. The influence of different geometries of the hologram writing-retrieval on the diffractionefficiency is described. Net amplification of one of the writing beams in two-beam coupling within the material has beenobserved. Recording of the holograms of 2-dimensional objects in real time has been demonstrated with good resolution andimage brightness. All the results were obtained with a low power visible laser diode emitting at 675 nm.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 72-81 |
| Number of pages | 10 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 2144 |
| DOIs | |
| State | Published - Jun 2 1994 |
| Event | Advanced Photonics Materials for Information Technology 1994 - Los Angeles, United States Duration: Jan 23 1994 → Jan 29 1994 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering