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Methacrylic azopolymers for holographic storage: A comparison among different polymer types.
|Authors:||Forcén, Patricia; Oriol, Luis; Sánchez-Somolinos, Carlos; Rodríguez, Francisco J.; Alcalá, Rafael|
|Citation:||European polymer journal 43(8): 0014-3057 (2007)|
|Abstract:||The photoinduced anisotropy and volume holographic storage in a series of polymers with different architectures and azo contents of 7% and 20% in weight have been investigated. Measurements of the birefringence (An) induced with nearly polarised 488 nm light show that for polymers with an azo content of 200%, the highest and more stable An values are achieved in copolymers with a di-block architecture. The An induced in polymers with 7 wt% azo content is not stable. Volume holographic polarisation gratings have been stored in the polymers. Only in the case of the di-block copolymer with an azo content of 20% in weight, the stored gratings are stable. A diffraction efficiency higher than 90% and an angular selectivity of 4 degrees have been achieved in gratings with a period of 2 mu m. It can be concluded that the di-block copolymer with 20 wt% azo content is the most suitable, among the studied copolymers, as volume holographic storage material.|
|Publisher version (URL):||http://dx.doi.org/10.1016/j.eurpolymj.2007.05.004|
|Appears in Collections:||(ICMA) Artículos|
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