| Original Articles |
|
|
|
|
Modified-PVK-based Photorefractive Three-Component Low-Tg Composites |
| WANG Feng1;CHEN Zhi-jian1;GONG Qi-huang1;CHEN Yi-wang2;CHEN Hui-ying2
|
| 1Department of Physics, Mesoscopic Physics Laboratory,
2Department of Chemistry, Peking University, Beijing 100871 |
|
| Cite this article: |
|
WANG Feng, CHEN Zhi-jian, GONG Qi-huang et al 1999 Chin. Phys. Lett. 16 353-355 |
|
|
|
Abstract Two modified poly(N-carbazole), poly (2-carbazolylethyl methacrylate) (PCEMA) and poly(3-carbazolylpropyl methacrylate) (PCPMA), were synthesized. Doped with electro-optic (EO) chromophore 1-n-butoxyl-2,5-dimethyl- 4-(4'-nitrophenylazo)benzene and the photosensitizer 2,4,7-trinitro-9-fl uorenone, the EO response and photore- fractive (PR) effect were studied experimentally. Due to the shorter spacer between the carbazolyl and the main-chain and thus a higher glass-transition-temperature Tg, PCEMA-based composite exhibited an effective EO coefficient as only a quarter as that in PCPMA-based composite. However, a slight higher two-beam coupling coefficient and much faster PR response were observed in the former. It was suggested that both the spacer length and the polymerization degree changed the Tg and the number density of traps, which decided the EO and PR
|
| Keywords:
42.70.Jk
42.65.Hw
|
|
|
Published: 01 May 1999
|
|
| PACS: |
42.70.Jk
|
(Polymers and organics)
|
| |
42.65.Hw
|
(Phase conjugation; photorefractive and Kerr effects)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
