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Publikācija: Holographic Recording of Surface Relief Gratings in Stilbene Azobenzene Derivatives at 633 nm

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Publikācijas valoda English (en)
Nosaukums oriģinālvalodā Holographic Recording of Surface Relief Gratings in Stilbene Azobenzene Derivatives at 633 nm
Pētniecības nozare 1. Dabaszinātnes
Pētniecības apakšnozare 1.3. Fizika un astronomija
Autori Andris Ozols
Dmitrijs Saharovs
Valdis Kokars
Valdis Kampars
Ansis Maļeckis
Gundars Mežinskis
Artūrs Plūdons
Atslēgas vārdi Holography, surface relief gratings, azobenzene
Anotācija Holographic recording in stilbene azobenzene derivatives by He-Ne 633 nm laser light has been experimentally studied. It was found that surface relief gratings (SRG) can be recorded by red light. Usually shorter wavelengths are used to induce the trans-cis photoisomerization in organic materials. SRG with 2 μm period and an amplitude of 130 nm have been recorded with 0.88 W/cm2 light in about 20 minutes in amorphous films of 3-(4-(bis(2- (trityloxy)ethyl)amino)phenyl)-2-(4-(2-bromo-4-nitrophenyl)diazenyl)phenyl)acrylonitrile spin-coated on glass substrates. Self-diffraction efficiency up to 17.4% and specific recording energy down to 114 J/(cm2%) were measured. The recorded SRG were stable as proved by subsequent AFM measurements. The photo-induced changes in absorption spectra did not reveal noticeable signs of trans-cis transformations. Rather, spectrally uniform bleaching of the films took place. We conclude that a photothermally stimulated photo-destruction of chromophores is responsible for the SRG recording. The recording of stable SRG in the stilbene azobenzene derivatives we studied is accompanied by the recording of relaxing volume-phase gratings due to the photo-orientation of chromophores by the linearly polarized recording light. It should also be noted that holographic recording efficiency in stilbene azobenzene derivatives exhibit an unusual non-monotonic sample storage-time dependence presumably caused by the peculiarities of structural relaxation of the films.
DOI: 10.1088/1742-6596/249/1/012055
Hipersaite: http://iopscience.iop.org/1742-6596/249/1/012055/ 
Atsauce Ozols, A., Saharovs, D., Kokars, V., Kampars, V., Maļeckis, A., Mežinskis, G., Plūdons, A. Holographic Recording of Surface Relief Gratings in Stilbene Azobenzene Derivatives at 633 nm. Journal of Physics: Conference Series, 2010, Vol.249, No.1, 012055.-012055.lpp. ISSN 1742-6588. Pieejams: doi:10.1088/1742-6596/249/1/012055
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