N
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.
Journal ArticleDOI
Polarization holographic recording in thin films of pure azopolymer and azopolymer based hybrid materials
Nataliya Berberova,D. Daskalova,Velichka Strijkova,D. Kostadinova,Dimana Nazarova,Lian Nedelchev,Elena Stoykova,Vera Marinova,C. H. Chi,Shiuan-Huei Lin +9 more
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.
Journal ArticleDOI
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
Nataliya Berberova,Dimana Nazarova,Lian Nedelchev,Blaga Blagoeva,Desislava Kostadinova,Vera Marinova,Elena Stoykova +6 more
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.