| Full text | |
| Author(s): |
Freschi, A. A.
[1]
;
de Vicente, F. S.
[2]
;
Mello, T. B.
[2]
;
Donatti, D. A.
[2]
;
Vollet, D. R.
[2]
Total Authors: 5
|
| Affiliation: | [1] Univ Fed ABC UFABC CECS, BR-09210170 Santo Andre, SP - Brazil
[2] Univ Estadual Paulista UNESP, IGCE, Dept Fis, BR-13500970 Rio Claro, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | APPLIED PHYSICS B-LASERS AND OPTICS; v. 111, n. 1, p. 103-109, APR 2013. |
| Web of Science Citations: | 3 |
| Abstract | |
We report investigations on running holograms recorded in an azopolymer film made of a poly(methyl methacrylate) matrix doped with Disperse Red 1. Two-wave mixing experiments were carried out in the symmetrical transmission geometry. A stabilization technique was employed for active control of the phase shift between the real-time hologram and the interference pattern. Depending on the imposed phase shift, a running hologram propagates in the material in the form of an isomerization wave created by a continuous erasing-rewriting process. Diffraction efficiencies and the hologram velocities were measured as functions of the holographic phase shift at the wavelengths 515 and 488 nm. The experimental results were compared to theoretical curves obtained from a simplified model of the isomerization kinetics. The selective contributions of the phase and the amplitude gratings to the whole hologram were also determined. (AU) | |
| FAPESP's process: | 11/18149-5 - Study of Photosensitivity and photoluminescence in organically modified silicates films prepared by sol-gel |
| Grantee: | Fábio Simões de Vicente |
| Support Opportunities: | Regular Research Grants |