Reference : Polarization holography reveals the nature of the grating in polymers containing azo-dye
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/2268/14746
Polarization holography reveals the nature of the grating in polymers containing azo-dye
English
Blanche, Pierre-Alexandre [University of Liège (ULg) > > Centre Spatial de Liège > >]
Lemaire, P. C. [University of Liège (ULg) > > Centre Spatial de Liège > >]
Maertens, Christophe [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Dubois, Philippe [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
1-Nov-2000
Optics Communications
Elsevier Science Bv
185
1-3
1-12
Yes (verified by ORBi)
International
0030-4018
Amsterdam
[en] To study the origin of reversible holographic recording in three polymers containing the same azo-dye, we have measured the diffraction efficiency and analyzed the gratings characteristics for various writing beams polarizations. The amplitude of the holographic grating, as well as the ratio between index and absorption modulations, have been investigated by gratings shifting. The total amount of diffracted power and the diffraction efficiency versus the reading beam polarization has been measured by non-degenerated four waves mixing. These experiments have revealed that the molecular mechanisms of holographic recording in the studied compounds are different. The photoinduced orientation of the chromophores is predominant for C6-C11-DMNPAA; so, in C11-C6-DMNPAA (DMNPAA: 2,5-dimethyl-4-(p-nitrophenylazo)anisole), the refractive index variation comes from the presence of both trans and cis populations generated by photoisomerization. The behavior of the PVK:DMNPAA is included between these extreme cases since both phenomena act.
Center for Education and Research on Macromolecules (CERM)
Researchers
http://hdl.handle.net/2268/14746
10.1016/S0030-4018(00)00975-5
http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TVF-41MHHK1-1-27&_cdi=5533&_user=532038&_orig=browse&_coverDate=11%2F01%2F2000&_sk=998149998&view=c&wchp=dGLbVzW-zSkWA&md5=f25809499931242c3a8c51da9f508c40&ie=/sdarticle.pdf
http://www.elsevier.com/wps/find/journaldescription.cws_home/505711/description#description
The authors acknowledge Optics Communications (Elsevier) for allowing them to archive this paper.

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