Journal ArticleDOI
Polarization holographic gratings in PAZO polymer films doped with particles of biometals
Ani Stoilova,Georgi Mateev,Dimana Nazarova,Lian Nedelchev,Elena Stoykova,Blaga Blagoeva,Nataliya Berberova,Stela Georgieva,Petar Todorov +8 more
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TLDR
In this paper, a study of the diffraction efficiency of polarization holographic gratings recorded in thin films of the azopolymer PAZO (poly[1]-4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt) was presented.Abstract:
The paper presents a study of the diffraction efficiency of polarization holographic gratings recorded in thin films of the azopolymer PAZO (poly[1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt]) doped with Cu(II) 3-amino-5,5′-dimethylhydantoin (CLP) and Ni(II) 3-amino-5,5′-dimethylhydantoin (NLP) at three different concentrations, namely 1, 2 and 5 wt.%. The influence of the dopants composition and concentration on the parameters of the polarization holographic gratings recorded in the thin composite films has been discussed. The gratings are recorded with a He-Cd gas laser with wavelength 442 nm. The polarization of the recording beams was left and right circular and the recording angle was 20°. Along with the anisotropic grating in the volume of the media, surface relief is also formed. The diffraction efficiency kinetics is probed at 635 nm and the height of the relief gratings is determined by AFM. Diffraction efficiency (η) higher than 30 % was achieved for the hybrid samples, as well as 585 nm surface relief height.read more
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Optically tunable diffraction efficiency by photo-mobile holographic composite polymer material
TL;DR: In this paper, the authors report on the fabrication and optical characterization of one-dimensional transmission holographic volume phase gratings written on a novel holographic composite mixture derived from a recently developed photo-mobile polymeric composite material.
Journal ArticleDOI
Photo-orientation Processes in Liquid Crystalline Polymethacrylates with Side Azobenzene Groups Having Lateral Methyl Substituents
Artem Boychuk,Valery Shibaev,Martin Cigl,Karel Pomeisl,Vĕra Hamplová,Damian Pociecha,Alexej Bubnov,Alexey Bobrovsky +7 more
TL;DR: In this article, the synthesis and comparative study of chiral liquid chiral materials has been discussed in the context of photoactive materials exhibiting nano-organization aiming for smart practical applications.
Journal ArticleDOI
On the Use of Haloalkane/Acrylate-Based Holographic Gratings as Compression and Rotation Sensors
Riccardo Castagna,Cristiano Riminesi,Andrea Di Donato,Oriano Francescangeli,Daniele E. Lucchetta +4 more
TL;DR: In this paper , a holographic phase reflection and transmission volume gratings based on multifunctional acrylates as linear compression and rotation sensors were used as linear rotational sensors.
Journal ArticleDOI
Hybrid Dispersion Model Characterization of PAZO Azopolymer Thin Films over the Entire Transmittance Spectrum Measured in the UV/VIS/NIR Spectral Region
Dorian Minkov,Lian Nedelchev,George Angelov,E. Márquez,Blaga Blagoeva,Georgi Mateev,Dimana Nazarova +6 more
TL;DR: In this article , a hybrid dispersion model (HDM) with two oscillators is employed in characterizations of PAZO polymer films in the range [300, 2500] nm, whereby the root-mean-square deviation (RMSD) of the fitted transmittance spectrum with respect to T(λ) does not exceed 1.6 × 10−3.
Journal ArticleDOI
Top-Performance Transmission Gratings with Haloalkanes-Based Polymeric Composite Materials
Riccardo Castagna,Cristiano Riminesi,Andrea Di Donato,Oriano Francescangeli,Daniele E. Lucchetta +4 more
TL;DR: In this article , the authors used a holographic mixture based on multi-reticulated acrylate and haloalkanes (1-bromo-butane and 1-Bromohexane) and a synergic combination of camphore-quinone, which has a maximum absorbance at c.a.
References
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Absorption and Scattering of Light by Small Particles
TL;DR: In this paper, a Potpourri of Particles is used to describe surface modes in small Particles and the Angular Dependence of Scattering is shown to be a function of the size of the particles.
Journal ArticleDOI
Nickel-dependent metalloenzymes.
TL;DR: This review describes the functions, structures, and mechanisms of nine nickel-containing enzymes: glyoxalase I, acireductone dioxygenase, urease, superoxide dismutase, [NiFe]-hydrogenase, carbon monoxide dehydrogen enzyme, acetyl-coenzyme A synthase/decarbonylase, methyl-coENzyme M reductase, and lactate racemase.
Journal ArticleDOI
Silica-nanoparticle-dispersed methacrylate photopolymers with net diffraction efficiency near 100%.
Naoaki Suzuki,Yasuo Tomita +1 more
TL;DR: In this paper, volume holographic recording in silica-nanoparticle-dispersed methacrylate photopolymers with reduced scattering loss as low as 2% was demonstrated.
Journal ArticleDOI
Holographic manipulation of nanoparticle distribution morphology in nanoparticle-dispersed photopolymers
TL;DR: It is found that holographic exposure causes nanoparticles to be redistributed from bright to dark regions, leading to periodic assembly of nanoparticles and thereby to formation of high-contrast holograms.
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