L
Lian Nedelchev
Researcher at Bulgarian Academy of Sciences
Publications - 72
Citations - 550
Lian Nedelchev is an academic researcher from Bulgarian Academy of Sciences. The author has contributed to research in topics: Birefringence & Diffraction efficiency. The author has an hindex of 11, co-authored 62 publications receiving 456 citations. Previous affiliations of Lian Nedelchev include Technical University of Denmark.
Papers
More filters
Journal ArticleDOI
Self-induced light polarization rotation in azobenzene-containing polymers
Ludmila Nikolova,Lian Nedelchev,Todor D. Todorov,Tz. Petrova,N. Tomova,V. Dragostinova,P. S. Ramanujam,S. Hvilsted +7 more
TL;DR: In this article, a self-induced rotation of the azimuth of elliptically polarized light passing through photobirefringent azopolymers is reported, where the induced rotation angle depends on the ellipticity of the input light.
Journal ArticleDOI
Photoinduced anisotropy in a family of amorphous azobenzene polyesters for optical storage.
TL;DR: The results indicate that the long-term stability at ambient temperature is closely related to the thermal stability of the photoinduced birefringence and a strong correlation has also been found between the response time and the Stability of the induced anisotropy toward illumination with unpolarized white light.
Journal ArticleDOI
Light propagation through photoinduced chiral structures in azobenzene-containing polymers
Lian Nedelchev,Ludmila Nikolova,Todor D. Todorov,Tzveta Petrova,N. Tomova,V. Dragostinova,P. S. Ramanujam,Søren Hvilsted +7 more
TL;DR: In this paper, the authors investigated light propagation through azobenzene-containing polymers with photoinduced chiral structures and showed that the structures have large pitch but the Mauguin condition is not fulfilled.
Journal ArticleDOI
Synthesis, spectroscopic and TD-DFT quantum mechanical study of azo-azomethine dyes. A laser induced trans-cis-trans photoisomerization cycle.
Anton Georgiev,Anton Kostadinov,Deyan Ivanov,D. Dimov,Simeon Stoyanov,Lian Nedelchev,Dimana Nazarova,Denitsa Yancheva +7 more
TL;DR: This paper describes the synthesis, spectroscopic characterization and quantum mechanical calculations of three azo-azomethine dyes, synthesized via condensation reaction between 4-(dimethylamino)benzaldehyde and three different 4-aminobenzene azo dyes.
Journal ArticleDOI
Increase of photoinduced birefringence in a new type of anisotropic nanocomposite: azopolymer doped with ZnO nanoparticles
TL;DR: There is a significant increase of about 50% of the photoinduced birefringence in nanocomposite films of azopolymer doped with ZnO nanoparticles compared with samples made from nondoped azopolymers.