Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Marcela Ursache"'
Publikováno v:
Modern Physics Letters B. 15:1131-1139
The dispersion of refractive indices and birefringence of EBBA were determined at different temperatures and the band contributions to these dependencies were computed. An improved Talbot–Rayleigh experimental setup was used and, in order to increa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5458af601e8c425a49b542b2c75a4b12
https://doi.org/10.1142/s0217984901002932
https://doi.org/10.1142/s0217984901002932
Autor:
Margareta Socaciu, Cristina Sarpe-tudoran, Liana-Daniela Socaciu, Violeta Calian, Marcela Ursache
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 321:125-131
The new thermo-electro-optical effect consist of visible spectra colours changing under a. d.c. electric field in a time periodical temperature variation around the given temperature value. This effect was remarked using a liquid crystal mixture TBBA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76823c6f1cf99e0283dfd712fdc94f66
https://doi.org/10.1080/10587259808025081
https://doi.org/10.1080/10587259808025081
Publikováno v:
SPIE Proceedings.
An extension of the Orthogonal Collocation Method is proposed in order to treat various realistic problems of nonlinear waveguiding in multiple-layer structures. The simulation results may be an important factor in designing multiple quantum wells st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af7a45a78e0919b831ede708b7e4a8e4
https://doi.org/10.1117/12.378713
https://doi.org/10.1117/12.378713
Publikováno v:
SPIE Proceedings.
Starting from the experimental channeled spectra I (λ, T) of the nematic EBBA liquid crystal and using a nonlinear optimization algorithm, we computed the dispersion curves of the ordinary and extraordinary indices, of the birefringence and the band
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e74dff628d21b076a0d35349c1cac3f5
https://doi.org/10.1117/12.378708
https://doi.org/10.1117/12.378708
Autor:
Margareta Socaciu, Stelian Radu, J. Neamtu, Marcela Ursache, Cristian Sarpe-Tudoran, G. Bratulescu
Publikováno v:
ROMOPTO '97: Fifth Conference on Optics.
Some interesting experimental results involving new synthesized liquid crystals. derivatives of 44-dihidroxyazobenzeneand 4.4'-dihidroxy-azoxvbenzene inferred by means of optical absorption spectroscopy are exposed. The absorption spectradependence o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c55d593073d7b936203011fa8fb5e155
https://doi.org/10.1117/12.312817
https://doi.org/10.1117/12.312817
Publikováno v:
ROMOPTO '97: Fifth Conference on Optics.
We performed both experimental and theoretical studies on the laser radiation absorption coefficient of a copper surface. A theoretical model for the computation of the absorption coefficient was elaborated for two-layer case (metal-oxide), taking in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7506b56f716d1f851f286ce042a18921
https://doi.org/10.1117/12.312797
https://doi.org/10.1117/12.312797
Publikováno v:
ROMOPTO '97: Fifth Conference on Optics.
radiation and we derived a simple theoretical model of the diffusion process. The results are in good agreement with thedata provided by other experimental methods.Keywords: liquid crystals, light scattering1. INTRODUCTIONThe low power monochromatic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3820b98d75365ceb90cdc31bcf5e9e13
https://doi.org/10.1117/12.312713
https://doi.org/10.1117/12.312713
Publikováno v:
ROMOPTO '97: Fifth Conference on Optics.
A numerical method for simulating realistic problems of mode coupling in optical transmission systems is described. The conclusion concerning waveguided propagation of the electromagnetic field in complex structures, selective mode excitation and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a41fb58781439165d46407bff99aa84e
https://doi.org/10.1117/12.312766
https://doi.org/10.1117/12.312766
Autor:
Violeta Calian, Marcela Ursache
Publikováno v:
SPIE Proceedings.
The spectrum of the quantized transverse eigenmodes of optoelectronic devices used in optical fiber communication systems is explicitly computed using harmonic analysis on the diamond solvable Lie group. Both analytical and numerical methods are used
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab5621758ec0bb061cc026042ec8f2d7
https://doi.org/10.1117/12.203462
https://doi.org/10.1117/12.203462
Publikováno v:
SPIE Proceedings.
A package of programs in Computational Optics is described, as well as the main results on rigorous solutions of the following problems: designing and optimization of optical systems, simulation for real rays tracing, computing the complete set of ge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9505dc4da3b8eb914a8d8214552baca1
https://doi.org/10.1117/12.203485
https://doi.org/10.1117/12.203485