Running holograms in azopolymer films

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 p...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2013-04, Vol.111 (1), p.103-109
Main Authors: Freschi, A. A., de Vicente, F. S., Mello, T. B., Donatti, D. A., Vollet, D. R.
Format: Article
Language:English
Subjects:
Diffraction efficiency
Engineering
Holograms
Holography
Isomerization
Lasers
Optical Devices
Optics
Phase shift
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Polymethyl methacrylates
Quantum Optics
Running
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Summary: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.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-012-5312-2