Zobrazeno 1 - 10
of 106
pro vyhledávání: '"L. Tsonev"'
Autor:
L. Tsonev
Publikováno v:
Optical Materials. 30:892-899
Based on the publications during the period 1990–2006, an attempt is made to summarize some of the important tendencies in integrated optics as well as the different techniques for activating lithium niobate by doping it with rare earth (lanthanide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55a2ba3e474fffe4f9ba6c2322aea584
https://doi.org/10.1016/j.optmat.2007.03.011
https://doi.org/10.1016/j.optmat.2007.03.011
Autor:
Minko Petrov, L. Tsonev
Publikováno v:
Liquid Crystals. 29:743-754
The surface-induced memorization of a smectic C liquid crystal texture in the temperature range of the nematic phase of 4-n-heptyloxybenzoic acid oriented by obliquely evaporated SiO on ITO was removed by imposing a bulk twist (Prevention of surface
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d26bc3db7d4a19b517f85bc1c2d15373
https://doi.org/10.1080/02678290210131512
https://doi.org/10.1080/02678290210131512
Autor:
L. Tsonev, Minko Petrov
Publikováno v:
Liquid Crystals. 27:1691-1694
An optical polarization method for indication of recorded oriented smectic C textures by the process of surface memorization and their accumulation and storage in the nematic temperature range is presented. The recorded accumulated data are identifie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce53426c4b1ba435c34c93dcd5a82fff
https://doi.org/10.1080/026782900750037275
https://doi.org/10.1080/026782900750037275
Publikováno v:
Crystal Research and Technology. 35:1321-1330
The dimer molecular structure of 4,n-alkyloxybenzoic acids displaying nematic and smectic C liquid crystal phases is investigated. AB INITIO molecular orbital calculations at HF/STO-3G level of theory are applied in order to calculate the molecule of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e097620e3f26dfac5cdfaab2474d8b1
https://doi.org/10.1002/1521-4079(200011)35:11/12<1321::aid-crat1321>3.0.co
https://doi.org/10.1002/1521-4079(200011)35:11/12<1321::aid-crat1321>3.0.co
Autor:
Minko Petrov, L. Tsonev
Publikováno v:
Liquid Crystals. 21:543-555
A surface memory effect (SME) is found in the dimerized nematic with short range smectic C order of 4-n-octyloxybenzoic acid (OOBA) in a cell whose walls have been covered with an obliquely evaporated SiO or ITO layer. The recording and erasure proce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68f8ba6160711a2e496f20e7e7b9bf52
https://doi.org/10.1080/02678299608032862
https://doi.org/10.1080/02678299608032862
Publikováno v:
Liquid Crystals. 17:717-728
The phase behaviour of a mixed dispersion of dioleoyl derivatives of phosphatidylethanolamine and phosphatidylcholine (3:1, by weight) in an excess of water was compared with that in 1·8 M trehalose using dynamic X-ray diffraction, differential scan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e10ebe0b8a221def1ea226eb4404cdfe
https://doi.org/10.1080/02678299408037343
https://doi.org/10.1080/02678299408037343
Publikováno v:
Optics Communications. 100:39-42
Numerical analysis of efficiency is made for holographic diffraction gratings with deep and very deep grooves (modulation depth up to 100%). The spectral interval with very high efficiency values could be shifted toward longer wavelengths away from t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41753d265762fa00858b322f3d7d2b8d
https://doi.org/10.1016/0030-4018(93)90553-h
https://doi.org/10.1016/0030-4018(93)90553-h
Publikováno v:
Applied optics. 35(10)
A proposal to use a high-angle echelle in the vacuum UV in the 350th order triggered a theoretical study to determine if there were unusual obstacles to success. No serious obstacles were found except for efficiency limitations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b859b8b9f38001f09df30786a0521dd
https://pubmed.ncbi.nlm.nih.gov/21085292
https://pubmed.ncbi.nlm.nih.gov/21085292
Publikováno v:
Applied optics. 34(10)
For lack of alternatives, echelle-grating diffraction behavior has in the past been modeled on scalar theory, despite observations that indicate significant deviations. To resolve this difficulty a detailed experimental, theoretical, and numerical st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af3f004827d9c7fbe05411846ad73ece
https://pubmed.ncbi.nlm.nih.gov/21037715
https://pubmed.ncbi.nlm.nih.gov/21037715
Publikováno v:
Applied optics. 31(25)
The experimental comparison between two concave holographic gratings with identical recording geometries and different exposure conditions demonstrates some possibilities for the optimization of the integral diffraction efficiency.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdc30e3ab3e871ab4684c8cece9d4e72
https://pubmed.ncbi.nlm.nih.gov/20733712
https://pubmed.ncbi.nlm.nih.gov/20733712