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Nataliya Berberova

Researcher at Bulgarian Academy of Sciences

Publications -  26
Citations -  143

Nataliya Berberova is an academic researcher from Bulgarian Academy of Sciences. The author has contributed to research in topics: Speckle pattern & Diffraction efficiency. The author has an hindex of 6, co-authored 26 publications receiving 112 citations.

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Journal ArticleDOI

Performance of intensity-based non-normalized pointwise algorithms in dynamic speckle analysis.

TL;DR: Intensity-based pointwise non-normalized algorithms for 2D evaluation of activity in optical metrology with dynamic speckle analysis are studied and compared and a new algorithm is proposed that provides the same quality of the 2D activity map for less computational effort.
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Polarization holographic recording in thin films of pure azopolymer and azopolymer based hybrid materials

TL;DR: In this paper, a comparison between the parameters of polarization holographic gratings recorded in a pure azopolymer PAZO (Poly[1]-4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt) and in a hybrid PAZo-based organic/inorganic material with incorporated ZnO nanoparticles of size less than 50nm is presented.
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Polarization holographic gratings with high diffraction efficiency recorded in azopolymer PAZO

TL;DR: In this paper, the authors studied the dependence of the diffraction efficiency on the recording angle and thickness of a series of azopolymer layers, and the results indicated that the highest diffraction efficiencies were obtained for the sample with thickness 2400nm and for recording angle 10°.
Proceedings ArticleDOI

Birefringence induced in azopolymer (PAZO) films with different thickness

TL;DR: In this paper, the photoinduced birefringence (Δn) in films of a water soluble azopolymer: poly[1- [4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl, sodium salt] (PAZO).
Journal ArticleDOI

Photoinduced variation of the Stokes parameters of light passing through thin films of azopolymer-based hybrid organic/inorganic materials

TL;DR: In this paper, a polarimetric study of thin films prepared from photoanisotropic hybrid materials: azopolymer (poly [1]-4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl, sodium salt]) doped with different concentrations of ZnO NPs with sizes below 50 nm.