Holographic recording materials development
Abstract
Organic photorefractive materials were evaluated for application in a reversible holographic memory system. Representative indigo and thioindigo derivatives and several stilbene derivatives were studied as well as 15, 16-dialkyldihydropyrene derivatives the following goals were achieved: (1) the successful writing of phase holograms in a thioindigo/polymer gel system, (2) the successful writing and erasing of phase holograms in a variety of indigo/polymer gel and indigo/solid polymer systems, and (3) the identification of indigoid dyes and 15, 16-dialkyldihydropyrene derivatives as materials potentially suitable for utilization in an operational system. Photochemical studies of the stilbene, indigo, thioindigo, and dialkyldihydropyrene derivatives in solution and in a variety of polymer matrix materials were conducted with the goal of optimizing the photorefractive behavior of the chemical system as a whole. The spectroscopic properties required of optimal photorefractive materials were identified, and it was shown that both the indigoid dyes and the dialkyldihydropyrenes closely match the required properties.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- March 1976
- Bibcode:
- 1976STIN...7623544V
- Keywords:
-
- Dyes;
- Holography;
- Photochemical Reactions;
- Random Access Memory;
- Stilbene;
- Gels;
- Isomerization;
- Polymers;
- Pyrenes;
- Refractivity;
- Instrumentation and Photography